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A man walking at the rate of 5 km/hr crosses a bridge in 15 min. The length of the bridge (in metres) is :
Answer & Solution
Correct Answer:
Option
D
$$\eqalign{
& 15\min = \frac{1}{4}{\text{hrs}} \cr
& {\text{1 hr }} \to {\text{5 kms}} \cr
& \frac{1}{4}{\text{hr}} \to \frac{5}{4}{\text{ kms}} \cr
& {\text{So, length of the bridge}} \cr
& = \frac{5}{4}{\text{ km}} \cr
& {\text{ = 1250 metres}} \cr} $$
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