16.A train 360 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 140 m long?
A. 40 sec
B. 42 sec
C. 45 sec
D. 48 sec
Option : A
Formula for converting from km/hr to m/s: X km/hr =
|
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X x
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5
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m/s
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18
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Therefore, Speed =
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45 x
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5
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m/sec =
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25
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m/sec.
|
18
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2
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Total distance to be covered = (360 + 140) m = 500 m.
Formula for finding Time =
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Distance
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Speed
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Therefore, Required time =
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500 x 2
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sec = 40sec.
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25
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