OverviewExercise"Forgiveness is a virtue of the brave."
- Indira Gandhi
|
Aptitude - Races and Games
|
| 11. |
In a 300 m race A beats B by 22.5 m or 6 seconds. B's time over the course is:
|
| A. |
86 sec | B. |
| 80 sec |
|
| | C. |
76 sec | D. |
None of these |
Answer: Option B
Explanation:
 B covers 300 m in |
 |
6 x |
2 |
x 300 |
 sec |
= 80 sec. |
| 45 |
|
| 12. |
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?
|
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.
|
| 13. |
In a 100 m race, A can beat B by 25 m and B can beat C by 4 m. In the same race, A can beat C by:
|
Answer: Option C
Explanation:
A : B = 100 : 75
B : C = 100 : 96.
| A : C = |
|
A |
x |
B |
|
= |
|
100 |
x |
100 |
|
= |
100 |
= 100 : 72. |
| B |
C |
75 |
96 |
72 |
A beats C by (100 - 72) m = 28 m.
|
|
|
|
