A goods train completely crosses a 120m long bridge with uniform speed v in t seconds. Then it will cross 240m long bridge with uniform speed 2v in. :

a)t secs

b)2t secs

c)less than t secs

d)more than t secs.

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- Mar 30th 2009, 11:02 PMsiddscool19Speed-time question..
A goods train completely crosses a 120m long bridge with uniform speed v in t seconds. Then it will cross 240m long bridge with uniform speed 2v in. :

a)t secs

b)2t secs

c)less than t secs

d)more than t secs. - Mar 31st 2009, 12:47 AMa69356
As per the statement

A goods train completely crosses a 120m long bridge with uniform speed v in t seconds.

t = 120/v

Now distance is 240 m and speed = 2v

Therefore time = 240/2v = 120/v = t secs

Thanks,

Ashish