A cylinder has a diameter of 10 inches and a height of 2.3 inches. What is the volume of this cylinder, to the nearest tenth of a cubic inch?

Question

7279 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-05-20T18:05:18

The volume of this cylinder is #57.5pi# or #180.6# cubic inches.

(Nearest tenth is the same as 1 decimal place)

The volume of a cylinder formula is:

#V=pir^2h#

The diameter is #10# inches, well half of the diameter is #5# inches which is the radius. Radius is half of the diameter.

If you want the diameter back, just double it. #5 + 5 = 10. #

So we can now plug the numbers into the formula.

#V=pi(5^2)(2.3)#
#V=pi(25)(2.3)" "# (5 Squared =25)
#V= 57.5pi#

But if you didn't want it in terms of #pi#, so you multiply:

#57.5xx 3.14# which you get #=180.55#

but rounding that to the nearest tenth is the same as rounding to #1# decimal place so you get

#180.6# cubic inches.