Question

11. 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 5 per square metre. Also, find the distance covered by a
boy in going 4 times round the park.​

Answer 1

Answer:

cost of levelling the park is 4000 unit and the distance covered by the boy is 480 m

Step-by-step explanation:

area of the rectangular path is 800m^2

breadth of the park is 40m.

then length of the park is 800/40 = 20m

per square levelling cost 5 unit

total area is 800 m^2

then levelling cost of total area is = 800 × 5 unit

= 4000 unit

perimeter of the park = 2 (length + breadth) = 2 (40+20) = 2×60 = 120 m

a boy is going around the park 4 times

around 1 time the boy crossed over 120 m

then around 4 times the boy crossed 120×4 = 480 m

therefore cost of levelling the park is 4000 unit and the distance covered by the boy is 480 m