If the radii of the circular ends of a conical bucket 45 cm high are 5 cm and 15 cm respectively, find the surface area of the bucket.
Given: for the bucket,
Height = 45cm
r’ = 5cm
r’’ = 15cm
Curved surface area = π(r’ + r’’)l + π r’’2
= π(5 + 15)(26) + π (15)2
= 745 π cm2
Curved surface area of bucket = 745π cm2