10.
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The length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is:
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A.
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200 m
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B.
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225 m
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C.
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245 m
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D.
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250 m
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Answer: Option C
Explanation:
Speed =
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45 x
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5
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m/sec
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=
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25
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m/sec.
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18
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2
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Time = 30 sec.
Let the length of bridge be x metres.
2(130 + x) = 750
x = 245 m.
