What length of canvas cloth which is 3m wide is used to make a conical tent 10m in diameter and 4.2m in slant height? find the cost of the canvas cloth at the rate of Rs.2.50 per m?
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Slant height = 4.2 m
Radius = Diameter÷2 = 10÷2 = 5 m
so curved surface area = π r l
22/7 × 5 × 4.2
curved surface area = 66 m²
It is given that the width of the canvas cloth is 3 m.
So, length of the canvas cloth used = Curved surface area/width
= 66/3 = 22 m
Total cost of canvas cloth used at the rate of Rs. 2.50 per m.
= length of the canvas cloth used × rate per metre
= 22 × 2.50
= Rs. 55
Radius = Diameter÷2 = 10÷2 = 5 m
so curved surface area = π r l
22/7 × 5 × 4.2
curved surface area = 66 m²
It is given that the width of the canvas cloth is 3 m.
So, length of the canvas cloth used = Curved surface area/width
= 66/3 = 22 m
Total cost of canvas cloth used at the rate of Rs. 2.50 per m.
= length of the canvas cloth used × rate per metre
= 22 × 2.50
= Rs. 55
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