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 2 of 5.
Lavanya said:
1 decade ago
Why do they do reciprocal 72/90?
Kalaivani said:
1 decade ago
Can any one please explain logic clearly. How and why 72/90?
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.
Venkat said:
1 decade ago
Can anyone explain it easily please?
Deepika said:
1 decade ago
A : B = 100 : 90.
A : C = 100 : 72.
So divide both this equation you get C:B = 4:5.
And now we find for same 100 m race so multiply by 5*20=100 because we Find b can give c in same race.
4*20/5*20 = 80/100 = C/B.
So B can give C = 100-80 = 20 answer
A : C = 100 : 72.
So divide both this equation you get C:B = 4:5.
And now we find for same 100 m race so multiply by 5*20=100 because we Find b can give c in same race.
4*20/5*20 = 80/100 = C/B.
So B can give C = 100-80 = 20 answer
Anime said:
1 decade ago
What is m here? Is it meter or minute?
Diya said:
1 decade ago
It is meter.
Jklomn said:
1 decade ago
B is 18 meters ahead of C when he is at 90 m, when he will finish the race he will be 20 m ahead.
Melvin said:
1 decade ago
How B give C 20? Is we simply check question the right answer is 18 because 28-10=18.
ARUN said:
1 decade ago
What is the meaning of A can give start of 10 meter?
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