Question

a train 100m long is to cross a river bridge of length 800 metre what time will it take to cross the bridge give the train moves with the constant speed of 36m/seconds?
note:;don't convert the time .. the time is already in seconds ​

Answer 1

Answer:To cross bridge completely engine of train has to travel 100m (ie it’s length) more in addition to bridge length of 800m.

Explanation:

So total distance to be travelled =900m

Speed=36km/hr

= 36 × (5/18) m/s

= 10 m/s

Therefore

Time taken = distance/speed

= 900/10

= 90 sec

Answer 2

Total distance required for the train to cross the bridge is,

d = (100 + 800) m = 900 m

Hence the time taken to cross the bridge is,

t = 900 / 36 = 25 s.