<PRE><B>Question 804038</B>
a box 18 cm by 9cm by 15 cm is being used to ship two cylindrical candles.
18 * 9 * 15 = 2430 cu/cm is the vol of the box
:
 Each candle has a diameter of 9cm and a height of 15cm.
2* {{{pi*4.5^2*15}}} = 1908.5 cu/cm is the vol of the candles
:
 What is the volume of the empty space in the box?
2430 - 1908.5  = 521.5 cu/cm is empty space
:
 What percent of the box is empty?
{{{521.5/2430}}} * 100 = 21.5% is empty</PRE>