Posted by Andrea on Wednesday, August 15, 2012 at 1:23pm.
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, Wednesday, August 15, 2012 at 2:11pm
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, Wednesday, August 15, 2012 at 2:30pm
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, Wednesday, August 15, 2012 at 3:29pm
oops  you are correct. I didn't watch the units!

math  andisiwe, Thursday, September 10, 2015 at 12:49pm
6cm and height h=16cm round it off yor answer to the nearest =3.14
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