NCHMCT JEE 2020 Question Paper with solutions for online practice

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Question : 89 of 200

Marks: +1, -0

A man walking at the rate of

5 {km} \/ {h}

crosses a bridge in

15 {min}

. The length of the bridge (in metres) is

600
750
1000
1250

Solution:

Speed of the

man=5 {km} \/ {h}

\;\; =5 × \;{1000}/{60} {m} \/ {min}

\;\; =\;{250}/{3} {m} \/ {min}

Time taken to cross the bridge

=15 {min}

Length of the bridge

=

Speed

\times

Time

=\;{250}/{3} × 15 {m}=1250 {m}

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