• A 222 metre long train crosses a pole in
6 seconds. The same train corsses a man
running in the same direction in 10 seconds,
what will be the speed of man ?
(1) 15 m / sec
(2) 17 m / sec
(3) 18 m / sec
(4) 14 m / sec
Answers
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Given:
✰ A 222 metre long train crosses a pole in 6 seconds.
✰ The same train corsses a man running in the same direction in 10 seconds.
To find:
✠ What will be the speed of man?
Solution:
We know that,
Distance = Speed/Time
➛ Speed of train = 222/6
➛ Speed of train = 37 m/sec
∴ The speed of train = 37 m/sec
Let the speed of man be x m/sec.
✭ Time = Distance/Speed ✭
Time taken = 222/(37 - x) sec
According to the question
➤ 222/(37 - x) = 10
➤ 222 = 10(37 - x)
➤ 222 = 370 - 10x
➤ 10x = 370 - 222
➤ 10x = 148
➤ x = 148/10
➤ x = 14.8 ≈ 15 (approx.)
∴ The speed of man ≈ 15 m/sec
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