Question

Clinton and Stacy want to buy a trampoline for their kids. They are considering two trampolines.

Trampoline A has a diameter of 14 feet.
Trampoline B has a diameter of 20 feet.
Approximately how much greater, in square feet and rounded to the nearest hundredth, is the area of Trampoline B than the area of Trampoline A?
Use 3.14 for π .

Answer 1

Approx. 640.56 ft² greater

Explanation:

The formula for the area of a circle is πr².

So, the area of the smaller trampoline is π×14², which is 3.14×196=615.44

The area of the larger trampoline is π×20², which is 3.14×400=1256

Subtract the larger area from the smaller

1256-615.44=640.56ft²