P gives Q a head-start of 2 seconds in a 400 m race, but both finish the race at the same time. Find the time taken by P to finish the race if the speed of Q is 2 m/sec.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 198 seconds.
Given that
P gives Q a head-start of 2 seconds in a 400 m race but both finish at the same time
The speed of Q = 2 m/sec
According to the question
⇒The time to complete the race by Q = 400/2 = 200 sec
As we know, Q is a headstart of 2 seconds
Hence, The time taken to finish the race by P = 200 - 2 = 198 sec.