Math, asked by Manveet, 1 year ago

A circular park of radius 20 metre has a road 5 metre wide running around it. Find the cost of metalling the road that Rs.14 per square metre. ( take pie -22 by 7)

Answers

Answered by ReetChauhan1112

area of road = area of park with road - area of park without road = πR²-πr² = (22/7)(25)²-(22/7)(20)² = 22×625/7-22×400/7 = 13750/7-8800/7 = 4950/7 m²
now,
cost of metalling 1 m² = 14 rs.
cost of metalling 4950/7 m² = (4950/7)×14 = 4950×2 = 9900 rs.

Manveet: Thanks a lot

ReetChauhan1112: u r most wlcum

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