Question

A bike to do tricks with has 20-inch-diameter wheels. Find the area of each wheel. Round to the nearest whole number. (Hint: Use the π key on your calculator and round at the last step. If you do not have such a key, use 22/7 for π and round at the last step.)
a)314 in.2
b)1,256 in.2
c)1,257 in.2
d)312 in.2

Answer 1

Area = $\pi r^2$

Area = 22/7 x 10 x 10

Area = 314 in^2

(the answer is option A, its rounded)

Hope this helps