The surface area of a cylinder is given by the formula SA = 2xr^2 + 2xrh.

A cylinder has a radius of 8 cm and a surface area of 768 cm^2 .
Find the height of the cylinder.
x=pi
47 cm
40 cm
24 cm
38 cm

Question

The surface area of a cylinder is given by the formula SA = 2xr^2 + 2xrh. 

A cylinder has a radius of 8 cm and a surface area of 768 cm^2 . 
Find the height of the cylinder.
x=pi
47 cm
40 cm
24 cm
38 cm

tkhunny · Answer

Have you considered substituting the given values?

SA = 2xr^2 + 2xrh

768 = 2x(8)^2 + 2x(8)h

The rest is algebra.  Solve for h.

anonymous · Answer

B?

tkhunny · Answer

You tell me.  Why is that your guess?  Did you prove it?