Question

A large pizza has diameter 36 cm and a medium pizza has diameter 30 cm. What is the difference in area of the pizzas? Round your answer to the nearest square centimetre.

Answer 1

311
`cm^(2)`

Explanation:

Taking a pizza to be a circle

Area of big pizza be x abd are of small pizza be y

hence difference = x-y

Area of a circle =
`\pi r^(2)` where r is the radius

taking
`\pi` to be 3.14

hence area x = 3.14 (
`(36)/(2)` *
`(36)/(2)`) = 1017.36

Area y = 3.14 (
`(30)/(2)` *
`(30)/(2)` )= 706.5

x-y = 1017.36- 706.5 =310.86
`cm^(2)`

310.86
`cm^(2)`