Question

The volume of a cylinder is 176cm

and its height is 11 cm.
What is the length of the cylinder's radius?
Enter your answer in the box. N
cm

Answer 1

Radius: 2.256758334

Explanation:

Reverse engineer the problem, by using the formula for finding the volume of a cylinder.

Volume of a cylinder = pi x r^2 x height

Formula to solve problem: pi x r^2 x 11 cm = 176 cm cubed.

176 divided by (pi x 11) = r^2 (5.092958179)

sqrt of 5.092958179 is 2.256758334

Answer 2

2.3 cm to 1 decimal Place

Explanation:

To work out radius do volume / (length * pi) then square root.

176 / 11pi which equals 5.1 you get 11 pi from doing length X pi

Square root the 5.1 to get 2.3. You square root because 5.1 is radius^2