In a 1 km race, P completes the race in 120 seconds and Q in 125 seconds. The distance by which P beats Q is:
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e 40 metres
Given that
The length of the racing track = 1000 m
P completes the race in 120 seconds and Q in 125 seconds
Speed = Distance/time
⇒Time difference = 125 - 120 = 5 sec
⇒Q covers 1000 m in 125 sec = 1000/125 = 8 m/s
Hence,The distance by which P beats Q is = 8 × 5 = 40 m.