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Nairaland Forum / Entertainment / Forum Games / Mathematicians Kindly Solve This,, (7553 Views)
Mathematicians Get In Here / Brain Teaser: Where Are The Mathematicians?? / Oya Mathematicians Where Una Dey! (2) (3) (4)
Mathematicians Kindly Solve This,, by Nobody: 5:55pm On Jan 10, 2016 |
1.A man travels 10km in 50mins if he runs for 8km and walks for 2km..if he runs 4km and walks 6km,his time is 1hr 15mins.find his running and walking speeds. 2.an equilateral triangle has has sides,,4acm,,3bcm,,and (a+b+c)cm,,,find a and b and the length of d sides of d triangle,, |
Re: Mathematicians Kindly Solve This,, by Nobody: 5:56pm On Jan 10, 2016 |
Mods,,lalasticlala,,fp |
Re: Mathematicians Kindly Solve This,, by skilfulsagei(m): 6:12pm On Jan 10, 2016 |
Siimple simultaneous equations. |
Re: Mathematicians Kindly Solve This,, by skilfulsagei(m): 6:13pm On Jan 10, 2016 |
Simple simultaneous equations. |
Re: Mathematicians Kindly Solve This,, by Nobody: 6:17pm On Jan 10, 2016 |
1. Running speed: 16km/hr Walking speed: 6km/hr |
Re: Mathematicians Kindly Solve This,, by Nobody: 6:17pm On Jan 10, 2016 |
skilfulsagei:Oya solve na |
Re: Mathematicians Kindly Solve This,, by Drniyi4u(m): 8:39am On Jan 11, 2016 |
ikihealthplus: Let r be his running speed and w be his walking speed. Convert the times to hours 50 min = 50/60 = 0.833hrs 1 hr 15 min = 1 + (15/60) hr = 1.25 hrs speed = distance/time therefore, time = distance / speed From the first statement, "A man travels 10km in 50mins if he runs for 8km and walks for 2km" Expressing mathematically, we have (8/r) + (2/w) = 0.833........(i) From the second statement, "if he runs 4km and walks 6km,his time is 1hr 15mins" Expressing mathematically, we have (4/r) + (6/w) = 1.25....(ii) Solving equations (i) and (ii) simultaneously, we have r = 16 and w = 6. Therefore running speed, r = 16 km/hr and walking speed, w = 6 km/hr. ikihealthplus: try to arrange the dimensions properly, are they 4a cm, 3b cm and (a+b+c) cm?? 1 Like |
Re: Mathematicians Kindly Solve This,, by Nobody: 9:33am On Jan 11, 2016 |
vfactor:pls kindly show working |
Re: Mathematicians Kindly Solve This,, by Nobody: 6:20pm On Jan 11, 2016 |
Drniyi4u:yes they are,,,kudos to d 1st question 1 Like 1 Share |
Re: Mathematicians Kindly Solve This,, by ImperfectMe(m): 10:37am On Jan 12, 2016 |
tried solving the first question simultaneously but couldn't get the answer....i got 24 as r and 10.67 as w...maybe i made a mistake somewhere or the process is wrong 1 Like 1 Share |
Re: Mathematicians Kindly Solve This,, by MoyoGENERAL: 1:02pm On Jan 14, 2016 |
for the second question, 4a=3b,...eq 1 a+b+c= 4a....eq2 form above, b+c=3a, therefore, 3b+3c= 9a...eq3, and 4a+3c=9a( substituting equation 1 in eq 3) from above, 3c=5a...eq 4 finding a relationship between a, b and c in a one ration form, 3c=5a=(15b/4)....eq 5 which gives, 12c=20a=15b...eq 6 now we want to find independent ratios in the form of, a:c:b, from above in eq 6, a:c = 12: 20, c:b= 15:12... therefore, a:c:b = 36:60:48.....which is 3:5:4.... making a=3, b=4, c=5.... QED!!!!!!!!! 1 Like |
Re: Mathematicians Kindly Solve This,, by Nobody: 1:29pm On Jan 14, 2016 |
now we want to find independent ratios in the form of, a:c:b, from above in eq 6, a:c = 12: 20, c:b= 15:12... therefore, a:c:b = 36:60:48.....which is 3:5:4.... making a=3, b=4, c=5.... QED!!!!!!!!! [/quote]kindly explain wat u mean by independent ratio,,i thnk u jst manipulated there,,coz taking ratio of a to c is 5 to 3 and not 3 to 5 |
Re: Mathematicians Kindly Solve This,, by MoyoGENERAL: 2:11pm On Jan 14, 2016 |
ikihealthplus: if you dont understand, simply ask for further clarification! YOU don't tell me i manipulated!... and by the way, to become better and faster in solving mathematics, you must be able to decipher lump steps even without writing it down.... Now let me explain to you step by step; 12c=20a=15b, is an embedded ratio...to make it independent means, to have the letters in one side and the figures at the other side, like, x:y:z= 50:100:150......you get! now since we have, 12c=20a=15b, now, trying to make the ration in that form, c/a=20/12, c:a=20:12, c/b=15/12, c:b = 15:12, rearranging, a:c= 12:20, c:b= 15:12, now combine the two above into one, we do that by making the value of c to be same, hence multiply the first by 3, then the second by 4, which gives, a:c= 36:60, and c:b = 60:48, therefore, a:c:b = 36:60:48, equivalent to 3:5:4, i.e., a=3, c=5, b=4..... any confusion? 1 Like |
Re: Mathematicians Kindly Solve This,, by Nobody: 12:27pm On Jan 19, 2016 |
MoyoGENERAL:nice one bro |
Re: Mathematicians Kindly Solve This,, by megabyte90: 8:05am On Feb 03, 2016 |
well done |
Re: Mathematicians Kindly Solve This,, by dubylhover(m): 10:46pm On Feb 05, 2016 |
MoyoGENERAL: oga,isn't an equilateral triangle supposed to have all 3 sides and angles equal? so from ur calc 3,4 and 5..it isn't an equilateral triangle again... |
Re: Mathematicians Kindly Solve This,, by MoyoGENERAL: 12:18am On Feb 06, 2016 |
dubylhover: haba bros....check am well naa. one side is 4a=4×3=12, one is 3b=3×4=12, and the last is =3+4+5=12... look well ooo. |
Re: Mathematicians Kindly Solve This,, by AHakeem2: 5:25pm On Nov 01, 2018 |
can any one help me out with this pls!! y''-4y'+9y=t with y(0)=0 y'(0)=1 |
Re: Mathematicians Kindly Solve This,, by AHakeem2: 8:43am On Nov 03, 2018 |
three sisters share some money. the oldest gets 9/11 of the money. the next girl gets 7/12 of the remainder. what fraction of the money does the youngest girl? |
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