Posted by Andrea on .
Find the volume and surface area of a right cylinder with radius 7.5 cm and height 16 in. Make sure your final answer is in inches. Round your answer to the nearest hundredth.

math 
Steve,
v = pi r^2 h
= 3.1416 * 7.5^2 * 16
= 1827.44 in^3
a = 2pi*r(r+h)
= 2*3.1416*7.5(7.5+16)
= 1107.41 in^2 
math 
Andrea,
Thanks, Steve. I believe we were supposed to convert the 16 inches into centimeters first (which is 40.64 cm, right?) to solve for both V and A and then take our final, notrounded answer, convert it back into inches, and then round.

math  oops 
Steve,
oops  you are correct. I didn't watch the units!

math 
andisiwe,
6cm and height h=16cm round it off yor answer to the nearest =3.14