Question

A rectangular field is 72 m by 58 m. Amar walks
round it at the rate of 3 km per hour. What time
will he take in taking 2 rounds.
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Answer 1

Answer:

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Step-by-step explanation:

Answer 2

Answer:

Given :

The length of the rectangular field = $72m$

The breadth of the rectangular field = $58m$

Speed of Amar per hour = 3km per hour

To do :

We have to find the time taken for 2 rounds.

Solution :

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

$= 2(72 + 58)$

$= 2 \times 130$

$= 260$

So , the distance coverd in one round = 260m

So, The distance covered in two rounds = 260 × 2 = 520m

$Speed = 3km = 3000m \: per \: hour$

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

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

$= 0.173 \: hr$

1 hour = 60 minutes

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

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