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What is the lenght of canvas cloth which is 3 meters wide is used to makea conical tent 10 meters in diameter and 4.2 meters slant height?Find the cost of

the canvas cloth at the rate of 2.50 per meter


Radius =10/2= 5 m
slant height,l= 4.2 m
area of curved surface =π× r× l
on solving , we get,
area= 66 m²
length of the canvas cloth =66/3
=22 m
now, cost = 22×2.50
=Rs 55
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