Question

A cylinder has a volume of 254. 34 inches cubed. The height of the cylinder is 4 inches. What is the radius of the circle?

O r=20. 25 inches
O r=4. 5 inches
O r=60. 84 inches
O r=7. 8 inches​

Answer 1

4.5 inches

Second answer choice

Explanation:

The volume of a circular cylinder is given by
V = π · r² · h

where
r = radius, h = height and V = volume

We are given
V = 254.34, h = 4

Plugging these into the formula we get

254.34 = π · r² · 4 = 4 π r²

r² = 254.34/4π = 20.2397

r = √(20.2397) = 4.4988 ≈ 4.5 inches

This would be the second answer choice