Chapter 1 - Measurement and Problem Solving - Learning Path Questions and Exercises - Exercises - Page 31: 62

The larger pizza is the better buy.

Medium pizza : R=4.5 inch Area$=\frac{22}{7}\times 4.5^{2}$=$63.6 inch^{2}$ Price per unit area$=\frac{7.95}{63.6}=0.125$ dollars per square inch Larger pizza : R=6 inch Area$=\frac{22}{7}\times 6^{2}$=$113.1 inch^{2}$ Price per unit area$=\frac{13.5}{113.1}=0.119$ dollars per square inch Since, larger pizza is cheaper per unit area, it is the better buy.