# A train 110 meters long passes a telegraph pole in 3 seconds.  How long will it take to cross a platform 165 meters long?

A. 4 seconds
B. 4.5 seconds
C. 7.5 seconds
D. 10 seconds

## 2 thoughts on “A train 110 meters long passes a telegraph pole in 3 seconds.  How long will it take to cross a platform 165 meters long?”

1. Sadiq Ur Rehman says:

1. Admin says:

According to the given problem statement;

Distance covered by train in 3 seconds = 110 meters

Then the speed of train can be calculated by the relation;

Speed = distance / time

Speed = 110 / 3 m/s = 36.67 m/s

So the train moves with a speed of 36.67 meters per second.

Train crosses a platform of length = 165 meters

Time taken to cross the platform = ?

Total length of train and platform= 165 + 110 meters = 275 meters

Repeating the relation for velocity;

velocity = distance / time

Time = distance / velocity = 275 / 36.67

Time = 7.5 seconds

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