1.

A train running at a speed of 72km/h. crosses a post in 10 second and crosses a platform in 18 second. in what time it will cross a tunnel 3 time more than platform

Answer»

It will cross a TUNNEL in 24 seconds

The tunnel is 3 times of platform
18-10=8
It looked 8 second to COVER the platform
Tunnel is 3 times of platform
3×8=24seconds

24 seconds time will be taken to cross a tunnel



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