Question

a face the cap used by Tuk is a shaped like a frustum if its radius on the open side is 10 cm radius at the upper base is 4 cm and its slant height is 15 cm find the area of material used for making it ​

Answer 1

Answer:

Since the cap is in form of frustum and is covered from upper side.

Area of material used to make cap

= curved surface area of frustum +  Area of circle proportion of upper side

= π(r1 + r2)l π(r2)^2

here

r1 = radius on lower base= 10 cm

r2= radius of upper base= 4 cm

l = slant height = 15 cm

Area of material:

= π(r1 + r2)l π(r2)^2

=  π( 4 + 10)15+π(4)^2

= π multiply by 14 multiply by 15 +  π multiply by 16

= π(210 + 16)

=  π(226)

= 4972/7

=710 2/7 cm^2

Answer 2

Answer:

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