Question

Circular end of a bucket of height 24cmare15cmand 5cm find the area of curved surface

Answer 1

Given height of a bucket (R) = 24cm  

Radius of circular ends of bucket 5cm and 15cm

r1 = 5cm; r2 = 15cm

Let ''l be slant height of bucket

l = √ ( ( r1 - r2 )² + h² )

→ l = √ ( ( 15 - 5 )² + 24² )

→ l = √ ( 10² + 24² )

→ l = √ ( 100 + 576 )

→ l = √ 676

→ l = √ 26²

→ l = 26

Now Curved surface area of bucket

→ π ( r1 + r2 ) l

→ π ( 5 + 15 ) 26

→ π ( 20 ) 26

→ 22/7 × 20 × 26

→ ( 440 × 26 ) / 7

→ 11440 / 7

→ 1634.28