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.​

Answer 1

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Perimeter of field:

$= 2(l + b)$

$= 2(72 + 58)$

$= 2 \times 130$

$= 260 \: m$

Converting metres in kilometres:

$1km = 1000m$

$x \: km = \frac{260}{1000}$

$= 0.26 \: km$

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