If in a race of 70m, A covers the distance in 20 seconds and B in 25 seconds, then A beats B by:
Pick one:
A) 20 m
B) 16 m
C) 14 m
D) 10 m
E) 15 m

Rationale: "explanation : the difference in the timing of a and b is 5 seconds . hence , a beats b by 5 seconds . the distance covered by b in 5 seconds = ( 70 * 5 ) / 25 = 14 m hence , a beats b by 14 m . answer c"
Answer: C