A man walking at the rate of $4 k m / h r$ crosses a bridge in $18$ minutes. Find the length of the bridge in metres.

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Solution

Distance $=$ speed $\times$ time
$18 m i n = \frac{18}{60}$ hours.
$= \frac{4 k m}{h r} \times (\frac{18}{60}) h r s$
$= 1.2$ kms.

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A man walking at the rate of 4km/hr crosses a bridge in 18 minutes. Find the length of the bridge in metres.

Distance=speed×time18min=1860 hours.=4kmhr×(1860)hrs=1.2kms.

A man walking at the rate of $4 k m / h r$ crosses a bridge in $18$ minutes. Find the length of the bridge in metres.

Distance $=$ speed $\times$ time
$18 m i n = \frac{18}{60}$ hours.
$= \frac{4 k m}{h r} \times (\frac{18}{60}) h r s$
$= 1.2$ kms.