In a 100-meter dash, A takes 36 seconds while B takes 45 seconds. In this race, A wins by a margin of:
A. 20 m
B. 25 m
C. 22.5 m
D. 9 m
Answer:A
In a 100-meter dash, A takes 36 seconds while B takes 45 seconds. In this race, A wins by a margin of:
A. 20 m B. 25 m C. 22.5 m D. 9 m
Explanation: B's distance travelled in 9 seconds = 100 / 45x 9 m = 20 m.A is 20 metres ahead of B.