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

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**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, not-rounded 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!

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**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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