Question

train 576m long crosses a tunnel in 1min30 seconds find the length of the tunnel if the speed of the train is 48 km/ hr

Answer 1

Answer:

624m

Step-by-step explanation:

Let the length of the tunnel is x metre.

Now, to cross the tunnel, train has to cover a total distance of = its own length + length of the tunnel.

Total distance =( 576 + x) m

Speed = 48 km/hr = 48 (1000/3600) m/s = 40/3 m/s

time = 1min30sec = 90 seconds.

So, distance = speed * time

(576+x) = (40/3)*90

=> 576+x = 1200

=> x = 1200 - 576 = 624m

Answer 2

Answer:

According to the formula :

Length of train = 576 m

Time taken to cross the tunnel = 1 hour 30 min = 1.5 min

Length of tunnel = Length of train + Speed

= 576 + 48

= 624 m

Hence the length of the tunnel is 624 m