A man walking at the rate of 5km/hrs crosses a beach in 15minutes the length of the bridge in metres
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1hr = 60mins
5km = 5000m
A man walks at the rate of 5km/hr = 5000m/60min
In 60mins he walks 5000m.
In 1min he walks = 5000/60m
In 15mins he can walk = 5000/60×15
= 5000/4m
= 125m
As he crosses a beach in 15mins.
Length of the bridge is 125m.
5km = 5000m
A man walks at the rate of 5km/hr = 5000m/60min
In 60mins he walks 5000m.
In 1min he walks = 5000/60m
In 15mins he can walk = 5000/60×15
= 5000/4m
= 125m
As he crosses a beach in 15mins.
Length of the bridge is 125m.
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