Question

Find the ratio between the time taken by a train 240 m long to cross a signal post and a bridge 80 m long.

Pls answer this AS SOON AS POSSIBLE
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Answer 1

Answer:

3:4

Step-by-step explanation:

Given that a train is 240 m long; Cross a signal post and bridge of length 80 m. We need to find out the ratio between the time taken by a train to cross a signal post and a bridge.

Let's say that the train is moving with a speed of 'x'. And speed of the train is same in both cases.

Now,

Speed = Distance/Time

Speed of train = Length of train/time taken

(where the distance covered by train is 240 m in t1 time.

→ x = 240/t1

Similarly,

Speed of train while crossing the bridge = (Length of train + Length of bridge)/Time taken

→ x = (240 + 80)/t2

→ x = 320/t2

Therefore, the ratio between the time taken by a train to cross a signal post and a bridge:

→ 240/320 = t1/t2

→ 3/4 = t1/t2

Hence, ratio is 3:4.