Home

What is the correct answer?

4

Length of a train is 130 meters and speed of train is 45 km/hour. This train can pass a bridge in 30 seconds, then find the length of the bridge.

A. 230 meters

B. 235 meters

C. 240 meters

D. 245 meters

Correct Answer :

D. 245 meters


Let the length of bridge is X
Speed of train is = 45*(5/18) m/sec = 25/2 m/sec
Time = 30 seconds
Total distance = 130+x
We know Speed = distance/time
so,130+x30=2522(130+x)=750x=245 meters
So length of the bridge is 245 meters

Related Questions

Two trains are running in opposite directions in the same speed. The length… How long does a train 110 meters long running at the speed of 72 km/hour… A 300 metre long train crosses a platform in 39 seconds while it crosses… A train 360 m long is running at a speed of 45 km/hr. In what time will… A train travelling at a speed of 75 mph enters a tunnel 31/2 miles long.… A jogger running at 9 kmph alongside a railway track in 240 metres ahead… A train 100 m long is running at the speed of 30 km / hr. Find the time… The length of the bridge, which a train 130 metres long and travelling… A train 110 metres long is running with a speed of 60 kmph. In what time… Two trains are running at 40 km/hr and 20 km/hr respectively in the same… Two stations A and B are 110 km apart on a straight line. One train starts… Two trains of equal lengths take 10 seconds and 15 seconds respectively… A train passes a station platform in 36 seconds and a man standing on… Two trains of equal length are running on parallel lines in the same direction… A train speeds past a pole in 15 seconds and a platform 100 meter long… Two goods train each 500 m long, are running in opposite directions on… A train is 360 meter long is running at a speed of 45 km/hour. In what… Two trains are running in opposite directions with the same speed. If… Two trains 140 metre and 160 metre long run at the speed of 60 km/hr and… Two trains running in opposite directions cross a man standing on the… A train 240 m long passes a pole in 24 seconds. How long will it take… A 270 metres long train running at the speed of 120 kmph crosses another… A train travelling at 48 kmph completely crosses another train having… A jogger running at 9 kmph alongside a railway track is 240 metres ahead… A train speeds past a pole in 15 seconds and a platform 100 m long in… A train overtakes two persons who are walking in the same direction in… Two trains, each 100 m long, moving in opposite directions, cross each… A train, 800 meter long is running with a speed of 78 km/hr. It crosses… A 300 meter long train crosses a platform in 39 seconds while it crosses… How many seconds will a 500 metre long train take to cross a man walking…