Question

One circular table has a diameter of 9 ft, and another circular table has a diameter of 20 ft. How much greater is the area of the larger table? Round to the nearest whole number

Answer 1

91 * 3.14 = 274

Answer 2

about 1,002 ft2
about 251 ft2
about 146 ft2
about 336 ft2

Answer 3

which one

Answer 4

probably 251

Answer 5

lets double check

Answer 6

Area = pi * r^2

Answer 7

r is radius. diameter is twice the size of the radius. So a circle with diameter of 20 will have a radius of 10 and a circle with a diameter of 9 will have a radius of 4.5.

Answer 8

to find the answer subtract the areas of the two circles

Answer 9

pi * 10^2 - pi * 4.5^2

Answer 10

pi * 100 - pi * 20.25

Answer 11

pi * 79.75 = 3.14 * 79.75 = 250.415

Answer 12

so the answer is closest to 251 ft^2