Question

A 300 m long train crosses a tree completely in 24 seconds. It will cross a 500 m long tunnel in how much time?
O 64 seconds
60 seconds
32 seconds
16 seconds​

Answer 1

Answer:

The bridge's length = 200m

The train's length = 300m.

Kindly note the entire train including the last wagons should cross the bridge. Hence, the total distance to be travelled = 200m + 300m = 500m

Speed of Train = 25m/s.

Therefore, Time = Distance/Speed = 500m/ 25 = 20second

Answer = (c) 20 seconds

Explanation:

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Answer 2

Answer:

The time taken by the train to cross the tunnel is 64 seconds.

Explanation:

Speed of the train= Length of the train/Time taken by the train

=300/24

=25/2 m/sec

Time is taken to cross the tunnel= (Length of the train+ Length of the Tunnel)/ Speed of the Train

= [(300+500)/25] × 2

= (800/25) × 2

=64 seconds

therefore, The time taken by the train to cross the tunnel is 64 seconds.

Note: In the sum, it was given that the 300m train crosses the man completely in 24sec, it means the trains cross its length in 24sec, this is the hidden meaning in this method sums, so if it is mentioned as the train crosses the man, pole, tree, etc, means it cross its distance in the given time.

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