A rectangular field is 72 m by 58 m. Amar walks around it at the rate of 3 km per hour. What time will he take in taking 2 rounds?

Given :

The length of the rectangular field $=72 m$.

The breadth of the rectangular field $=58 m$.

Speed of Amar $= 3 km$ per hour.

To do :

We have to find the time taken for 2 rounds.

Solution :

Perimeter of the rectangle $= 2(l+b)$

                                                 $=2(72+58)$

                                                 $=2(130) = 260$.

So, the distance covered in one round $= 260 m$.

The distance covered in two rounds $= 2\times 260 = 520 m$.

Speed $= 3 km = 3000 m$ per hr.

$Time = \frac{Distance}{Speed}$

$Time = \frac{520}{3000}$

          $= 0.173 hr$. 

$1 hr = 60 min$

$0.17 hr = 0.17 \times 60 = 10.4$ minutes.

Therefore, the time taken to cover 2 rounds is 10.4 minutes.

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Updated on: 10-Oct-2022

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