A. 48
B. 60
C. 54
D. 90
A. 86 sec
B. 80 sec
C. 76 sec
D. None of these
[B].
[C].
[D].
Answer: Option A
Explanation:
| Distance covered by B in 9 sec. = | 100 | x 9 | m | = 20 m. | |
| 45 |
A beats B by 20 metres.
A. 140m
B. 125m
C. 100m
D. 110m
[B].
[C].
[D].
Answer: Option D
Explanation:
A : B = 100 : 90.
A : C = 100 : 87.
| B | = | B | x | A | = | 90 | x | 100 | = | 30 | . |
| C | A | C | 100 | 87 | 29 |
When B runs 30 m, C runs 29 m.
| When B runs 180 m, C runs | 29 | x 180 | m | = 174 m. | |
| 30 |
B beats C by (180 – 174) m = 6 m.
A. 150 m
B. 125 m
C. 130 m
D. 100 m
Explanation:
A can give B (5 min – 4 1/2 min) = 30 sec start.
The distance covered by B in 5 min = 1000 m.
Distance covered in 30 sec = (1000 * 30)/300 = 100 m.
A can give B 100m start.
A. 50
B. 40
C. 25
D. 15
Explanation:
A scores 60 while B score 40 and C scores 30.
The number of points that C scores when B scores 100 = (100 * 30)/40 = 25 * 3 = 75.
In a game of 100 points, B gives (100 – 75) = 25 points to C.