7. In 100 m race, A covers the distance in 36 seconds and B in 45 seconds. In this race A beats B by:
A. 25 m
B. 9 m
C. 20 m
D. 22.5 m
7. In 100 m race, A covers the distance in 36 seconds and B in 45 seconds. In this race A beats B by:
A. 25 m
B. 9 m
C. 20 m
D. 22.5 m