How long will it take a 3km long goods train traveling at 28Kmph to get completely through a bridge that

inorder to travel through the bridge completely then train should cover 6km(3km is train length+3km bridge)
speed=distance/time
28/60(1hr==60mins)=6/time
by cross multiplication time=(6*60)/28
ans===time==12.86min
11 years agoHelpfull: Yes(6) No(0)
to get completely through a bridge the engine should travel through 6km so it takes 12.86km

28kms---60min
6kms---?
60*6/28=12.8587 approximately=12.86min
11 years agoHelpfull: Yes(4) No(0)
total distance to travel by the train = 3km(bridge) + 3km(length of train)=6km
so, time =(6/28)*60 min=12.86 min
11 years agoHelpfull: Yes(3) No(0)
explain clearly
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total distance 6km. so 6/28 hours i.e, 6*60/28=12.86
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t=(length of of plate form + length of the train)/speed of the train
t=6/28 hour
or t=6*60/28=12.86 minutes
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are they ask in tcs
they are even easy then rs a
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How long will it take a 3km long goods train traveling at 28Kmph to get completely through a bridge that is 3km long?
a) 6.43 minutes
b) 12.86 minutes
c) 19.29 minutes
d) 560 minutes