brendan34747
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HELP ME PLZ!!!!!!!! ANYONE HELP ME
Find the volume of a cylinder with a diameter of 8 inches and a height that is three times the radius. Use 3.14 for pi and round your answer to the nearest hundredth. (Hint: You may only enter numerals, decimal points, and negative signs in the answer blank)

Respuesta :

rubydai03

First off, the formula for finding the volume of a cylinder is:                               V=pi × radius² × height

So, because the diameter is 8 inches, to find radius, we just divide by 2 so R=8÷2=4. The radius is 4 inches.

Then because it said that the height is 3 times the radius, 3×4=12. The height is 12 inches.

Now, we can plug in our information and use the formula to find the volume (V=pi × r² × h) :

V= 3.14×4²×12

=3.14×16×12

=608.88 cubic cm ( it can also be written 608.88 cm³)

And there you have the volume. (If this is wrong, then I apologize. I'm pretty sure it's correct tho. If it is wrong, I'll be happy to try to solve it again for you.)

brblolthx

Ok, so the radius is half the diameter.

8/2=4=radius.

Height is 3 times the radius.

4*3=12=height.

Now the formula of a cylinder is V=Ï€r2h

Simplify V= 3.14*(4*4)*12

V= 3.14*16*12

V= 3.14*192

After that, V is about 603.19 in. cubed

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