Question

what is the surface area of this sphere?
round your answer to the nearest hundredth.
20 yd
square yards

Explanation:

Step1: Find radius

The diameter is 20 yd, so radius $r = \frac{20}{2} = 10$ yd.

Step2: Apply surface area formula

Surface area of sphere: $4\pi r^2 = 4\pi(10)^2 = 400\pi$

Step3: Calculate numerical value

$400\pi \approx 400 \times 3.1415926535 \approx 1256.64$

Answer:

1256.64