₦airaland Forum

Umartins1:



The thing is, I knew why the guy posted d question.....

IamTobie:
Lol... Swagking, na you be my boss' boss... I doff my hat..... No, I tear my hat and bow....

RobinHez:
leave dat man and woman make de dey cuss demselves all in the name of poetry

Pukka36:
Sleeping time yaff rish


Robin,lock the door pls and hand Dharay the keyz




U pipu should go and sleep na...


Ada,see Ur eye like cat own

Pukka36:
Sleeping time yaff rish


Robin,lock the door pls and hand Dharay the keyz




U pipu should go and sleep na...


Ada,see Ur eye like cat own

SwagkingDope:
I knw na,definitely!
Xo,u shuld amend ya ways 4rm nw o

IamTobie:
Soulflex, when u kome, ask me what I meant, I will explain....

SwagkingDope:
I Jux taya 4 them o0!

Ada96:
sleep ke are you not gonna attend tonight's meeting?

RobinHez:
if i lock door where freda go see road fly comot?

R= 26cm/2

= 13cm


r= 20cm/2

= 10cm

Pi R² - pi r²

Pi (R² - r²)

Pi (R+r)(R-r)

Pi ( 13+10)(13-10)

Pi (23)(3)

69pi........... Option B.

using completing the square method,


4t²+7t-1=0

4t²+7t=1

t² + 7t/4 = 1/4

(7/4 * 1/2)²

(7/8}²

49/64


Add 49/64 to both sides

t² + 7t/4 + 49/64 = 1/4 + 49/64

(t+ 7/8}² = (16+49) / 64

(t + 7/8}² = 65/64

t+7/8 = ± _/65/64

t= -7/8±_/65 / 8

t= -7/8±8.06/8

t= -7+8.06/8

t= 0.1325............. Option C

area of circular plate= pi r²

Area of ball (sphere) = 4pi r²

Pi r² = 1/16 * 4pi r²

P= pi r²/4

Pi r² = 4p

r² = 4P/pi

r= _/4P /pi

r= 2_/P /pi

r= 2 * _/P / 1.772

r= 1.127_/P..... Option D.

a=3

a+4d=9

Sub for a

3+4d=9

4d=9-3

4d=6

d=3/2


S_n= n/2 (2a+(n-1)d)

81= n/2 (2*3+(n-1)3/2)

162= n(6+(n-1)3/2)

162= n(6+ 3n/2 -3/2)

162= n (12+3n-3 / 2)

162= n( 9+3n / 2)

3n²+9n=324

3n²+9n-324=0

3n²+36n-27n-324=0

3n(n+12)-27(n+12)=0

(3n-27)(n+12)=0

3n=27 or n=-12

n= 9 or -12

Since n cannot be negative,

n=9.......... Option C.

3x+5y+17=0

5y= -3x-17

y= -3x/5 - 17/5

M₁ = -3/5

M₁M₂ = -1

M₂ = -1/M₁

M₂ = -1/ -3/5

= 5/3...... Option D

please re-visit the question and/or the options.

y= 4x+3

y= mx+c

Compare....

C= 3..... Option A

6C₄

= 6! / 4!(6-4)!

15ways..... Option D

4C₂ * 5C₃

4! / 2!2! * 5! / 3!2!

60ways..... Option B

x-2y+4= 0

-2y= -4-x

y= -4/-2 + x/2

y= 2 + x/2

M₁ = 1/2

M₁M₂ = -1

M₂ = -1/M₁

M₂ = -1/ 1/2

= -2

y=-1, x=1, m=-2

y=mx+c

-1=-2*1 + c

-1=-2+c

C= -1+2

C= 1

y= -2x+1

y+2x=1........ Option B.

m= y₂-y₁ / x₂-x₁

= 2-(-p) / -2p-(-1)

M₁ = 2+p / -2p+1


2y+8x+17=0

2y= -8x-17

y= -8x/2 - 17/2

y= -4x- 17/2

M₂ = -4


M₁ = M₂

2+p / -2p+1 = -4

2+p= -4(-2p+1)

2+p=8p+-4

p-8p=-4-2

-7p=-6

p= 6/7..... Option C

sin teta = x/2 / x

Sin teta = x/2 * 1/x

Sin teta = 1/2

Teta = sin^-1 1/2

Teta= 30^o

Teta= 30^o * 2

Teta= 60^o

L= teta/360 * 2 * pi * r

= 60/360 * 2 * pi * r

= 1/6 * 2 * pi * r

= pi r / 3 ........ Option A

V = 4/3 pi r³

dv/dr = 4 pi r²

dv/dt = dv/dr * dr/dt

15 = 4pi r² * dr/dt

15 = 4pi (10)² * dr/dt

15= 400pi * dr/dt

dr/dt= 15/400pi

dr/dt = 3/80pi........ Option B

Umartins1:

1. If r has one share, q has 2 shares. P gets 1 1/3 of q share. Hence, p gets 5 1/3 shares.


Sharing ratio = 5 1/3 : 2 : 1

= 15 : 6 : 3

Sum of ratio= 24


Q's share = 6/24 * #680

= #170.



No Correct Option.








2. When CP = #15700 at 10%profit,

C.P = 100/110 * #15700

= #14272.72727


At a profit of 18%

S.P= 118/100 * #14272.72727

= #16841.8


No correct option.



Another Method


Let x= C.P

Profit= 10/100 * x

= x/10

P= SP-CP

x/10= 15700-x

x= 10(15700-x)

x= 157000-10x

x+10x = 157000

11x = 157000

x= 14272.72727

C.P. = 14272.72727

At a profit of 18%,

Let S.P= x

%P= SP-CP/ CP *100

x-#14272.72727 / #14272.72727 * 100 = 18


100x-#1427272 / #14272.72727 = 18


x= #16841.8

Answer to the first is 240


p : q | q : r
1 : 2 | 3 : 4

Since q is the common term, crossmultiply both by Q's values.

Terms become

p : q : r
3 : 6 : 8

Q's value

6/17 x 680 = 240

The other one is correct

Copy: Ada96

Pukka36, sorry I am just seeing the mention. Thanks. More please

Segipaul:
1. What is the area between two concentric circles diameters 26cm and 20cm? A. 169pie B. 69pie C. 9pie D. 269pie
2. The positive root of 't' in the following equation 4t² + 7t -1 =0 correct to 4 d.p A. 1.0622 B. 10.6225 C. 0.1325 D. 0.3215
3. The area of a circular plate is one-sixteenth the surface area of a ball. If the area of the plate is given as Pcm² the radius of the ball is A. 1.33P B. 1.14P C. 2.04P D. 1.27P
4. The first term of an Ap is 3 and the fifth term is 9. Find the number of terms in the progression if the sum of the term is 81 A. 12 B. 36 C. 9 D. 27
5. Find the slope of the line which is perpendicular to the line 3x +5y +17=0 A. 3/5 B. -5/3 C. -3/5 D. 5/3
6. Locate the coordinates of point where the curve y=3x² -8x +10 A. 2, 6 B. -2, 6 C. 2, -6 D. -2, -6
7. Find the intercept of equation y=4x +3 that passes through the origin A. 3 B. 0 C. -3 D. None of the above
8. A final examination requires that a student should answer 4 out of 6 questions. In How many ways can this be done A. 17 B. 30 C. 360 D. 15
9. A committee of 5 is to be formed from four italians and five europeans. In how many ways can this be done so that the committee contains at least 3 europeans A. 81 B. 60 C. 1 D. 324
10. Two perpendicular lines PQ and QR intersect at (1, -1) if the equation of PQ is x-2y+4=0 find the equation of QR A. x-2y=-1 B. 2x+y=1 C. 2x-y=3 D. x+2y=1
11. Find the value of P if the line which passes through the point (-1, -p) and (-2p, 2) is parallel to the line 2y +8x +17=0 A. -6/7 B. 2/7 C. 6/7 D. -2/7
12. The cord ST of a circle is equal to the radius r of the circle, find the length of arc ST A. Pie r/3 B. Pie r/2 C. Pie r/12 D. Pie r/6
13. A spherical ballon is being inflated and the volume is increasing at the rate of 15cm²/sec At what rate is the radius increasing when it is 10cm A. 4/40pie cm/s B. 3/80pie cm/s C. 4/80 pie cm/sec D. 3/40 pie cm/sec
14. A spherical bubble is decreasing in volume at rate 2cm³, find the rate which the surface area is diminishing when the radius is 3cm A. -3/4pie cm²/s B. -1/18 pie cm²/s C. -4/3 pie cm²/s D. -18 pie cm²/s

Ada96:
are those questions up there mathematics choi! emi ko

Pukka36:
Good morning people!

Scrypt:
[color=#000030]Answer to the first is 240


p : q | q : r
1 : 2 | 3 : 4

Since q is the common term, crossmultiply both by Q's values.

Terms become

p : q : r
3 : 6 : 8

Q's value

6/17 x 680 = 240

The other one is correct

Copy: Ada96

Pukka sorry I am just seeing the mention. Thanks. More please [/color]

Damscrob:
To all putmites in d ouse..Beyond all reasonable doubts,The putme will take place on July 25,2015....and forms will be on sale July 4,2015...Heard this info frm a Top staff on campus......Pls start preparing and Burning midnight oil....This year is your year of admission...Amen!!!!

Hon. Damscrob(reppin 300L chemical engineering class)

for more info

Whatsapp: 08104459028(whatsapp only...no calls)....

Bye for now...

Pukka36:
Good morning people!

Brian10:
Morning.. Please there is a particular song I wish to know the title. It's a ROCK worship..


The Chorus:
I can't do it on my own
Take my hand

RobinHez:
was it a female dat sang it?

Brian10:
Morning.. Please there is a particular song I wish to know the title. It's a ROCK worship..


The Chorus:
I can't do it on my own
Take my hand

Brian10:
Morning.. Please there is a particular song I wish to know the title. It's a ROCK worship..


The Chorus:
I can't do it on my own
Take my hand

dharay99:

hmmm..see direct predictions.
Will see if ur ryt....