A train 150 m long is running at a speed of 90kmph. Time taken by the train to cross a tree is
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6hr will be the answer
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Time taken by train to cross the tree depends on the distance between train and tree
Let's say the tree is x metres away from train
Train will approach the tree in distance x
But it will cross the tree in distance
( x + 150)
Speed of train = 90 km/hr
= 90000/3600
= 900/36 = 300/12 = 100/4
= 25 m/sec.
Now,
Speed = distance/time
Time = distance/speed
= (x + 150)/25
Now all depends on x
i.e. the distance between train to tree
Let's say the tree is x metres away from train
Train will approach the tree in distance x
But it will cross the tree in distance
( x + 150)
Speed of train = 90 km/hr
= 90000/3600
= 900/36 = 300/12 = 100/4
= 25 m/sec.
Now,
Speed = distance/time
Time = distance/speed
= (x + 150)/25
Now all depends on x
i.e. the distance between train to tree
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