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Question

What is the length of the bridge which a man riding 15 km an hour can cross in 5 minutes?

A
850 m
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B
1050 m
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C
1250 m
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D
Can't be determined
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Solution

The correct option is C 1250 m
Speed of man =15km/hr

Time needed =5min=560hr

Distance=Speed×Time
=15×560

=1.25km

Distance =1.25km=(1.25×1000)m=1250m

The length of the bridge is 1250m

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