Question

If Cindy uses 1 1 half cups of sugar to make 2 pints of Kool-aid, how much sugar would she need for 5 pints of Kool-aid? ANS.( Use decimal number) cups __________ cups.

Answer 1

Question:

Solution:

Consider the following diagram (rule of three):

note that 1 1/2 is a mixed number so the above is equivalent to:

by cross-multiplication, this is equivalent to:

$X\text{ = }\frac{\frac{3}{2}\text{ x 5}}{2}\text{ = }\frac{\frac{15}{2}}{2}\text{ = }\frac{15}{4}\text{ = 3.75}$

then, the correct answer is:

the sugar for 5 pints is 3.75 cups.