1.  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 runs 45 m in 6 sec.
2

B covers 300 m in 6 x 2 x 300 sec
45
= 80 sec.