Question

a train 110 M long Travels at 30 km per hour how long will it take to cross a platform 90 M long

Answer 1

speed = 30 km per hr
=30000/3600=25/3m per sec
total distance to be covered=110m+90m
=200m
25/3m=1sec
1m = 1/(25/3)sec
200m= 3/25*200
= 24sec
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