Question

how many metres of cloth 2 m wide will be required to make a conical tent having the radius of base 7 m and height 24 m

Answer 1

Given, r = 7 m

h = 24 m

∴ slant height l = √(r2 + h2) = √(49 + 576) = √625 = 25 m

CSA of the cone = πrll = 22/7 x 7 x 25 = 550 m2

Area of the cloth used = 550 m2

Given, width of the cloth = 2 m

=550/2

=275 cloths