Question

A solid cylinder of height 10 cm and radius 4 cm is to be plated

with material costing $11 per cm². Find the cost of the plating.

Answer 1

Answer: $3870

Explanation

Total Surface area of cylinder = 2 x pi x r x h +2( pi x r^2)

TSA = 2 × 3.14 × 4 × 10 + 2( 3.14 ×16)

TSA = 251.2 + 100.48

= 351.68

Cost = 351.68 × 11

= $ 3870