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A can run 440 m in 51 seconds and B in 55 seconds. By how many seconds will B win if he has 40 m start?
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- 1 seconds
- 2 seconds
- 3 seconds
- 4 seconds
Correct Option: A
To reach the winning post B will have to cover the distance (440 – 40) = 400 m.
Hence,
time taken by B to cover 440 meter = 55
time taken by B to cover 1 meter = 55 / 440
time taken by B to cover 400 meter = 400 x 55 / 440 = 40 x 55/44 =10 x 55/11 = 10 x 5
time taken by B to cover 400 meter = 50 Sec.
Since, A reaches the winning post in 51 sec. while B in 50 sec.
So, B will win by 1 second.
