Vishwanath
Tuesday, February 19, 2013
24. | A runs 1 times as fast as B. If A gives B a start of 80 m, how far must the winning post be so that A and B might reach it at the same time? |
A. | 200 m | B. | 300 m | C. | 270 m | D. | 160 m |
|
Answer: Option A
Explanation:
Ratio of the speeds of A and B = | 5 | : 1 = 5 : 3. |
3 |
Thus, in race of 5 m, A gains 2 m over B.
2 m are gained by A in a race of 5 m.
80 m will be gained by A in race of |
| 5 | x 80 | m | = 200 m. |
2 |
Winning post is 200 m away from the starting point.
Title : Races And Games Q24
Description : 24. A runs 1 times as fast as B. If A gives B a start of 80 m, how far must the winning post be so that A and B might reach it at the sam...
Rating : 5
