Question

What is the area of a circular wading pool with a radius of 50 cm?

A. 157.1 cm2
B. 7854.0 cm2
C. 314.2 cm2
D. 31415.9 cm2

Answer 1

B. 7854.0 cm2

The area of a circle is given by A= π
`r^(2)` where r is the radius

So A= π
`50^(2)` = 7854.0 cm2

Answer 2

To solve this problem, you will need to use the formula for finding the area of a circle, which is A = πr².

In this case, the radius (r) of the circular wading pool is given as 50 cm.

Plug this value into the formula, so now you have A = π(50 cm)².

Remember, squaring the radius means you multiply it by itself. So, 50 cm squared equals 2500c cm².

Then, you multiply this result by the constant π (Pi), which we will approximate as 3.1415.

So the equation is now A = π(2500 cm²), or A = 3.1415 * 2500 cm².

When you perform this multiplication, the result is approximately 7854.0 cm².

So, the area of the circular wading pool, with a radius of 50 cm, is approximately 7854.0 cm². Therefore, the correct choice is

Answer: B: 7854.0 cm².