a+b=10........eq1
a+c=20.........eq2
b+c=24.........eq3

Combine eq2 and eq3
Therefore b-a=4.......eq4
Now, combine eq1 and eq4
Therefore 2b = 14
b=7
a=3
c=17

Combine weight 7+3+17=27kg.......lobatan!

husseinjnr:
Let A= Rabbit
B= Cat
C = dog

From Figure above, in simple analysis

A + B = 10kg -----------equation 1

A + C = 20kg -----------equation 2

B + C = 24 kg ---------- equation 3


From equation 2,
A= 20- C

From equation 3

B= 24- C

Substitute A and B into equation 1

20-C + 24-C =10

44-2C = 10

-2C= 10-44

-2C = -34

C= 34/2

C= 17

Substitute C into equation 2

A+ 17 = 20
A= 3

Substitute C into equation 3

B+17 = 24

B= 7

Therefore

A= 3, B= 7, C= 17

Total weight is 3+7+17 = 27

Rabbit= 3kg

Cat = 7kg

Dog = 17kg

good

Let
D = Weight of the dog,
C = Weight of the cat, and
R = Weight of the rabbit

Let X = their combined weight.

Required:

X = D + C + R

Solution:

We are given the following:

C + R = 10..............(1)

C + D = 24..............(2)

D + R = 20..............(3)

From (1) we have the following:

C = 10 - R..............(4)

Substituting (4) in (2) we have:

(10 - R) + D = 24

===>> D - R = 24 - 10
===>> D - R = 14...........(5)

Solving (3) and (5) simultaneously, we have the following:

D + R = 20.............(2)
D - R = 14.............(3)

Adding (2) and (3) we will have:

(D + D) + (R - R) = (20 +14)

====>> 2D = 34

Dividing through by 2 we have:

D = 17...............(6)

Substitute for D in (2) we have:

17 + R = 20 ===>> R = 20 - 17

Hence, R = 3........(7)

Substituting for R in (1) we have:

C + 3 = 10 ===>> C = 10 -3 = 7.........(

Given that the combined weight is thus:

X = D + C + R

We have from (6), (7) and ( the following:

X = 17 + 7 + 3

===>> X = 27

Therefore their combined weight is 27 kg

Set theory

Folksyharry:
what will the three animals weigh?

Straight forward without all this mathematics; use the 2nd picture and d 3rd picture to demystify d mystery. Simple

27kg

The dog is 17kg
Cat is 7kg
And d Rabbit is 3kg

This is how I did mine

What this maths question also show is Nairalanders can lie!. So, because
someone answered correctly, everybody now get the same answer?. No single
wrong answer?.
If a Nairalander tell you to COME you'd better RUN.

No need for long calculations.

Simply add up the weights (10+20+24)

That's 54kg (made up of 2 cats, two dogs and two rabbits)

54/2 = 27kg (1cat, 1dog and 1 rabbit)

I did a simple figure 1,2,3 added together gives 54kg = combined weight of 2 rabbits + 2 cats + 2 dogs. Divided by 2 gives 27kg as answered by the algeraens.

dechandel:
When i tell you to apply logical reasoning in life.. I know what i am saying

Imagine when a law student beat an engineering graduate in a maths essay

if i catch u. u wanna start this engineering / law duel?
parralel turning, broaching and drilling vs u yelling my name as i land my gavel in ur supreme immaculate court

lifestyle1:
Lets assume rabbit, cat and dog’s weight are R,C and D correspondingly.

then we can say

Equation 1: R + C = 10

Equation 2: D + R = 20

Equation 3: C + D= 24

Then we need to find value of C + R + D

On adding Equation 1,2 and 3

2R + 2 C + 2D = 54 => R+C+D = 27

Na expo i use o

The most brilliant of all the solutions!!!!

27kg

d total weight of d animals in d "picture" is equivalent to d weight of d picture. no calculations required :Pd total weight of d animals in d "picture" is equivalent to d weight of d picture. no calculations required

bros e never reach to comot CV na

husseinjnr:
Let A= Rabbit
B= Cat
C = dog

From Figure above, in simple analysis

A + B = 10kg -----------equation 1

A + C = 20kg -----------equation 2

B + C = 24 kg ---------- equation 3


From equation 2,
A= 20- C

From equation 3

B= 24- C

Substitute A and B into equation 1

20-C + 24-C =10

44-2C = 10

-2C= 10-44

-2C = -34

C= 34/2

C= 17

Substitute C into equation 2

A+ 17 = 20
A= 3

Substitute C into equation 3

B+17 = 24

B= 7

Therefore

A= 3, B= 7, C= 17

Total weight is 3+7+17 = 27

Rabbit= 3kg

Cat = 7kg

Dog = 17kg

Misogynist2014:
That's how they fail exams.

Who? Ur fellows?

Hysmady:
Who? Ur fellows?

He asked for collective weight, not individual weight.

C + R=10kg
D + R= 20kg
D + C= 24kg
Adding equation 1,2&3
2C+2D+2R =10+20+24
C+D+R = 54/2
= 27kg

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30

jacksparrow1207:


YOU DULL SMALL SHA

Im com bright after im dull finish

MistadeRegal:


Im com bright after im dull finish

[size=18pt]THAT KIND CANDLE LIGHT BRIGHT [/size]

omo, i have been calculation all day its 27 i think joor

since 99% of you said 27, so why do i stress myself to calculate it.? abeg d answer is 27

Let cat be C
Let dog be D
Let Rabbit be R

C+R=10..... EQU1
D+R=20..... EQU2
D+C=24..... EQU3
D+C+R=?

C=10-R.... EQU4
D=20-R.... EQU5

SUBSTITUTE EQU4 AND EQU5 INTO EQU3
D+C=24
20-R+10-R=24
30-2R=24
-2R=24-30
-2R=-6
2R=6
R=6/2
R=3 (Rabbit)

SUBSTITUTE R INTO EQU1
C+3= 10
C=10-3=7
C=7 (Cat)

SUBSTITUTE R INTO EQU2
D+R=20
D+3=20
D=20-3
D=17 (Dog)

TOTAL= D+C+R= 17+7+3= 27kg

27

kilokeys:
lol.. i stumbled on this q last week.. in d dead of d night.
went tthrough stress solving it.. while my e-bae dechandel made a good guess using a shorter method.. i almost cried

oboy see kakulation.
menn u try o

Yungwizzzy:
How are mine supposed to know when it's just a drawing?

bring the animals in real life and I'll weigh them simple!!

kilokeys:
lol.. i stumbled on this q last week.. in d dead of d night.
went tthrough stress solving it.. while my e-bae dechandel made a good guess using a shorter method.. i almost cried

Na ur handwriting be that

make dem enter soup pot first.ehen i go come siddon weigh them wella

husseinjnr:
Let A= Rabbit
B= Cat
C = dog

From Figure above, in simple analysis

A + B = 10kg -----------equation 1

A + C = 20kg -----------equation 2

B + C = 24 kg ---------- equation 3


From equation 2,
A= 20- C

From equation 3

B= 24- C

Substitute A and B into equation 1

20-C + 24-C =10

44-2C = 10

-2C= 10-44

-2C = -34

C= 34/2

C= 17

Substitute C into equation 2

A+ 17 = 20
A= 3

Substitute C into equation 3

B+17 = 24

B= 7

Therefore

A= 3, B= 7, C= 17

Total weight is 3+7+17 = 27

Rabbit= 3kg

Cat = 7kg

Dog = 17kg

u sabi book o, thank God for people like u on NL

Visual method