Question

Two sprinters run the same race of 400metres. one runs at a speed of 8metres per second and the other at 6metres per second. By what time will the first sprinter beat the other.

Answer 1

Time taken by 1st sprinter = 400/8 = 50s
Time taken by 2nd sprinter = 400/6 = 66.67s
Time by which 1st beated the 2nd
= 66.67-50
= 16.67s

Answer 2

time taken by first sprinters = 400m/8
: =50s
time taken by second sprinter = 400m/6
= 66.67s
beating time = 16.67s