Problem 221
The two cereal boxes shown have corresponding edges in a ratio of 2:3. If the smaller box sells for $2.50 and the larger box for $4.00, which is the better buy? Why?
What assumption(s) do you have to make when solving
the problem? Estimate, then check.
Solution
Let V1 = volume of the smaller box and V2 = volume of other box
V2 = V1(
) 3 = 
V1
= = 3.375
=
= 1.6
So greater box is better buy because: we are getting more volume in less price in case of greater box.
Assumption: – Volume of Cereal in each box= volume of the box