9. Find the time taken by a train, of length 225 m, travelling at a speed of 54 km/h to cross (a) a tree near
the railway track, (b) a railway platform of length 585 m.
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Answer:
Length of train =225m
Speed of train=54km/h
[m-km=÷1000]
(a) time take to cross a tree=225÷1000=0.225
=0.225÷54
Time take to cross a tree=0.0041 hour
(b). Length of platform=585m
time take to cross a platform=585+225=810÷1000
=0.810÷54
Time take to cross a platform=0.015 hour
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