Problem: If pint of paint is needed to paint a statue ft. high, then the number of pints it will take to paint (to the same thickness) copies ft. high, is
Answer Choices:
A.
B.
C.
D.
E.
Solution:
The number of pints of paint used varies jointly as the square of the height of each and the the number of statues painted which is to say . When and gives the constant of variation
so that . Now when and , we get pints.