A train having a length of 350 m crosses a bridge of length 750 m. If the speed of the train is 55 km/h, how much time will the train take to cross the bridge?
Answers
Step-by-step explanation:
total distance to be covered=350+750=1100m
speed=55km/hr.
=55×5/18 m/sec.=275/18 m/s
time =1100×18/275=72 min.
Answer:
72 seconds ,to the nearest second.
Step-by-step explanation:
The train is 350m long while the bridge is 750 m long. So the total distance to be covered is actually 750 + 350 ,which is 1100m.
We are given the speed of the train ,which is 55km/hr. We have the distance in metres. In this case, we have to convert the speed that is given in km/hr to m/s, as in:
36km/hr = 10 m/s
55km/hr?
We then croos multiply;
(55 km/hr × 10 m/s) ÷ 36 km/hr
550/36 = 15.2778 m/s
Since we now have the total distance and the speed, we can now work out the time taken using the following formula
Time = Distance / Speed
Time = 1100 ÷ 15.2778
= 71.9998 seconds
To the nearest second, the train took 72 seconds to cross the bridge.