A pillar candle is shaped like a cylinder with a radius of 1.5 inches. The candle holds 123 cubic inches of wax. How tall is the candle? Use 3.14 for pi. Round your answer to the nearest hundredth.

12.50 inches
15.76 inches
17.41 inches
18.76 inches

Question

A pillar candle is shaped like a cylinder with a radius of 1.5 inches. The candle holds 123 cubic inches of wax. How tall is the candle? Use 3.14 for pi. Round your answer to the nearest hundredth. 
 	
	12.50 inches
	15.76 inches
	17.41 inches
	18.76 inches

anonymous · Answer

Formula:

$V = \pi r^2 h$

We just have to solve for 'h':

$123 = (3.14)(1.5^2)h$

anonymous · Answer

Can you do that? @Plm202

anonymous · Answer

I don't really under stand volume can you explain it to me?

anonymous · Answer

Just solve for 'h'.

What's 1.5 * 1.5?

anonymous · Answer

Multiply that.

anonymous · Answer

2.25

anonymous · Answer

Yes, so we have:

$123 = (3.14)(2.25)h$

What's 3.14 * 2.25?

anonymous · Answer

7.065

anonymous · Answer

Yes, so we have:

$123 = 7.065h$

Now for the final step we divide 7.065 to both sides, what's 123 / 7.065?

anonymous · Answer

17.409766

anonymous · Answer

Yes, so our answer is approximately 17.41.

anonymous · Answer

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anonymous · Answer

I know. Thank you very much iGreen for the help!

anonymous · Answer

No problem! :)