Correct Answer - Option 3 : 165π cm
3
Given
Outer diameter = 14 cm
Inner diameter = 8 cm
Length of pipe = 5 cm
Formula used
Volume of pipe = Volume of pipe(outer radius) – Volume of pipe(inner radius)
= πR2 h – πr2 h, where R and r are outer radius and inner radius and h is height
Calculation
Outer radius = 14/2 = 7 cm
Inner radius = 8/2 = 4 cm
Volume of pipe = πh(R2 – r 2)
⇒ π × 5(7 – 4) (7 + 4)
⇒ 5 π × 3 × 11
⇒ 165π cm3