Question

how long does a 100 m long train takes to cross a bridge of length 4.9 km at a speed of 50 m/s?

Answer 1

Hope it helps you thanks

Answer 2

Time taken  by train to cross a bridge is  100 Seconds.

Explanation:Given:

100 m long train takes to cross a bridge of length 4.9 km at a speed of 50 m/s.

To Find:

Time taken  by train to cross a bridge.

Solution:

As given,100 m long train takes to cross a bridge of length 4.9 km at a speed of 50 m/s.

Speed of train $=50\ \frac{m}{s}$.

Length of train=100 m

Length of  bridge $=4.9 \ km=4900 \ m.$

Total distance = Length of train + Length of bridge

                        $=100+4900=5000\ m$

$Speed=\frac{ Total \ distance }{Time\ taken\ to\ cover \ distance }$

$50=\frac{ 5000 }{Time\ taken\ to\ cover \ distance }$

$Time\ taken\ to\ cover \ distance = 100 \ Seconds.$

                                            

                                               

Thus,Time taken  by train to cross a bridge is 100 Seconds.

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