Two boys are standing on the opposite ends of a 540 metres long bridge. If they start walking towards each other at same time at the speed of 18 metres/minute and 12 metres/minute respectively, then in how much time will they meet each other?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 18 minutes.
The length of the bridge (distance between the two boys) = 540 metres.
The speed of the first boy = 18 metres/minute
The speed of the second boy = 12 metres/minute
Combined speed = 18 + 12 = 30 metres/minute
Time = Distance/Speed
Here:
Distance = 540 metres
Combined speed = 30 metres/minute
⇒ Time = 540/30 = 18 minutes
The two boys will meet each other in 18 minutes.