If the radii of the circular ends of a conical bucket 45 cm high are 5

1.	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.
Answer» Given: for the bucket, Height = 45 cm r’ = 5 cm r’’ = 15 cm 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

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.

Answer»

Given:

for the bucket,

Height = 45 cm

r’ = 5 cm

r’’ = 15 cm

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