Given
Slant height of frustum (l)= 15 cm
Let radius of smaller circle end (r) = 4 cm
Let radius of larger circle end (R) = 10 cm
Find out
We have to find the area of material used for making it
Solution
Area of material used for making it = Curve surface area + area of upper base
= (π(r+R)l) + (πr2)
= π ((r+R)l + r2)
= π ((4+10) × 15 + (4 × 4))= 22/7× (226)
= 710.286 cm2
Answer
Hence, the area of material used for making it = 710.286 cm2