Question
A man walking at the rate of 5 km/hr crosses a bridge in 15 minutes. What is the length of the bridge (in metres)?
A man walking at the rate of 5 km/hr crosses a bridge in 15 minutes. What is the length of the bridge (in metres)?
Answer: Option A
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Answer : Option A
Explanation :
$MF#%\begin{align}&\text{Speed = 5 km/hr}\\\\
&\text{Time = 15 minutes = }\dfrac{1}{4}\text{ hour}\\\\
&\text{Length of the bridge = Distance Travelled by the man = Speed } \times \text{ Time = }5 \times \dfrac{1}{4}\text{ km}\\\\
&= 5 \times \dfrac{1}{4} \times 1000 \text{ metre} = 1250\text{ metre}\end{align} $MF#%
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