Aptitude - Races and Games - Discussion
Discussion Forum : Races and Games - General Questions (Q.No. 1)
1.
In a 100 m race, A can give B 10 m and C 28 m. In the same race B can give C:
Answer: Option
Explanation:
A : B = 100 : 90.
A : C = 100 : 72.
| B : C = | B | x | A | = | 90 | x | 100 | = | 90 | . |
| A | C | 100 | 72 | 72 |
When B runs 90 m, C runs 72 m.
| When B runs 100 m, C runs |  |
72 | x 100 |  m |
= 80 m. |
| 90 |
B can give C 20 m.
Discussion:
43 comments Page 4 of 5.
Nadeem pasha said:
1 decade ago
100 --- A.
90 --- B.
72 --- C.
When B covers 90m distance between A and B is 18m,
When B covers 100m distance between B and C is,
90 --- 18
100 --- ?
By cross multiplication we get 20.
90 --- B.
72 --- C.
When B covers 90m distance between A and B is 18m,
When B covers 100m distance between B and C is,
90 --- 18
100 --- ?
By cross multiplication we get 20.
Kalaivani said:
1 decade ago
Can any one please explain logic clearly. How and why 72/90?
Lavanya said:
1 decade ago
Why do they do reciprocal 72/90?
Gopal said:
1 decade ago
*-------------------*
<---100m------------> A
<-----90-------> B
<-----72---> C
When A completed race(100m) then B ahead 90 and c Ahead 72, and Distance between B & c = 18m.
i.e., When B cover 90 then distance between B & c = 18.
So When B cover 100 then distance between B & c = 18*100/90 =20 m.
<---100m------------> A
<-----90-------> B
<-----72---> C
When A completed race(100m) then B ahead 90 and c Ahead 72, and Distance between B & c = 18m.
i.e., When B cover 90 then distance between B & c = 18.
So When B cover 100 then distance between B & c = 18*100/90 =20 m.
Ezhilmangai said:
1 decade ago
A can give to B as 10,so B can give two times for A.so B can give C as 20.
Manojit said:
1 decade ago
Because it is same race. They must complete same distance so when B has completed 100 m. He will give C 20m.
Prasanna said:
1 decade ago
Why not going the race at which the question says? That is when finish the game B is 18m ahead of C.
Bharath ks said:
1 decade ago
Can anyone explain it easily please ?
Saru said:
1 decade ago
Why we use B/AxA/c here?
Shameer said:
1 decade ago
Why we not use A:B:C=90:X:72 ?
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