The area of a rectangular park is 800 $m^{2}$ and its breadth is 40 m. Find the cost of levelling it at the rate of Rs. 5 per square metre. Also, find the distance covered by a boy in going 4 times around the park.

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Solution

Area =length $\times$ breadth
800=length $\times 40$
=length =20
cost 800 $\times 5 = 4000$ Rs
perimeters=2(l+h)
=2(60)=120 m
distance covered by a boy
$= 4 \times 120 = 480 m$

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The area of a rectangular park is 800 m2 and its breadth is 40 m. Find the cost of levelling it at the rate of Rs. 5 per square metre. Also, find the distance covered by a boy in going 4 times around the park.

Area =length× breadth800=length×40=length =20cost 800×5=4000 Rsperimeters=2(l+h)=2(60)=120 mdistance covered by a boy =4×120=480m

The area of a rectangular park is 800 $m^{2}$ and its breadth is 40 m. Find the cost of levelling it at the rate of Rs. 5 per square metre. Also, find the distance covered by a boy in going 4 times around the park.

Area =length $\times$ breadth
800=length $\times 40$
=length =20
cost 800 $\times 5 = 4000$ Rs
perimeters=2(l+h)
=2(60)=120 m
distance covered by a boy
$= 4 \times 120 = 480 m$