a train 300 M long passes an electric pole in 15 seconds find the speed of the train and how long will it take to cross a bridge 200 metre long and how long it will take to overtake another train 250 m long moving at 54 km per hour in the same direction
Answers
Given : A train 300 m long passes an electric pole in 15 seconds
To Find : the speed of the train
how long will it take to cross a bridge 200 metre long
how long it will take to overtake another train 250 m long moving at 54 km per hour in the same direction
Solution:
300 m long passes an electric pole in 15 seconds
= speed of Train = 300/15
=> Speed of Train = 20 m/s
=> Speed of train = 20 x 3600/1000 = 72 km/hr
Time taken to cross a bridge 200 meter long = ( 300 + 200)/20
= 25 sec
overtake another train 250 m long moving at 54 km per hour in the same direction
54 km per hour = 54 * 5/18 = 15 m/s
Relative Speed = 20 - 15 = 5 m/s
Distance to be covered = 300 + 250 = 550 m
Time taken = 550/5 = 110 secs
Learn More:
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Step-by-step explanation:
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