Question

Jill buys two circular pizzas. How much greater, in square inches, is the area of the medium pizza than the small pizza? Round your answer to the nearest tenth

Answer 1

Answer:

63 $in^{2}$

Step-by-step explanation:

First we need to  find the area of each pizza in  square inches with pizza with the round shape, then calculate  the difference.    

The formula of area of circle is:

Area = π$r^{2}$

As we know, medium pizza has 12 inch diameter and small pizza has 8 inch diameter.

• For 12 inch diameter, radius = 6

A = π$(6)^{2}$ = 36π $in^{2}$  

• For 8 inch diameter, radius = 4

A = π$(4)^{2}$ = 16π $in^{2}$

Difference of the two area:  36π - 16π = 20π $in^{2}$

by putting the value of π, the difference is

A=20 * 3.14 => 63 $in^{2}$

Answer 2

Answer:

62.9 in²

step-by-step explanation:

Diameters of medium and small sized pizzas are 12 and 8 inches respectively

Therefore,their radiuses are 6 and 4

Area of circle is pi×r²

~ 22/7×6²= 113.14(area of the bigger pizza)

~ 22/7×4²=50.29(are of smaller pizza)

The difference between their areas are now 113.14 - 50.29 = 62.9 in²