Question

⦁ Katelyn is making a set of three candles for her friend for Christmas. If the candles have a radius of 1 inch and a height of 4 inches, how much wax will she need to do all three candles?

Answer 1

Approximately 38 cube inches of wax.

Explanation:

The candle can be assumed to have the shape of a cylinder, so that;

volume of a cylinder =
`\pi`
`r^(2)`h

where: r is the radius and h the height of the cylinder.

Thus,

volume of each candle =
`\pi`
`r^(2)`h

But radius is 1 inch and height is 4 inches, then;

volume of each candle =
`(22)/(7)` x
`1^(2)` x 4

=
`(22)/(7)` x 1 x 4

= 12.5714

volume of each candle = 12.6 cube inches.

Therefore, for the three candles;

volume of the three candles = 3 x 12.5714

= 37.7142

volume of the three candles = 37.7142 cube inches

The amount of wax required for the three candles is approximately 38 cube inches.