aman walking at the rate of 5 km/h crosses bridge in 15 min. length of bridge
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First convert km/h to m/s
For this multiply 5 by 5/18
that is equal to 25/18
now convert 15 minutes to seconds
15×60
=900 seconds....
now distance=speed × time
that is, 25/18 × 900
25× 50 = 1250 metres
hence the length of the bridge is 1.25 km
For this multiply 5 by 5/18
that is equal to 25/18
now convert 15 minutes to seconds
15×60
=900 seconds....
now distance=speed × time
that is, 25/18 × 900
25× 50 = 1250 metres
hence the length of the bridge is 1.25 km
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