Question

The volume of a cylinder is 448 pie cm cube and height 7cm .Find it's radius

Answer 1

Let the radius of cylinder be r cm
Now,
Volume of Cylinder = pi* r^2* h
=> 448 * pi = pi * r^2 * 7
=> r^2 * 7 = 448
=> r^2 = 64
=> r = 8 cm.

Answer 2

volume = 448 * 22/7 cm^3
= 1408 cm^3
height = 7
A.T.P
22/7 * r^2 * 7 =1408
22 * r^2 = 1408
r^2 = 1408/22
r^2 = 64
r = 8 cm