Question

find the surface area of this sphere. use 3.14 for π. 10 m surface area of a sphere sa = 4πr² sa = ? m² round your answer to the nearest tenth.

Explanation:

Step1: Identify the radius

The radius \( r \) of the sphere is given as \( 10 \) m.

Step2: Use the surface area formula for a sphere

The formula for the surface area of a sphere is \( SA = 4\pi r^2 \). Substitute \( \pi = 3.14 \) and \( r = 10 \) into the formula.
First, calculate \( r^2 \): \( r^2 = 10^2 = 100 \).
Then, multiply by \( 4\pi \): \( SA = 4\times3.14\times100 \).
Calculate \( 4\times3.14 = 12.56 \), then \( 12.56\times100 = 1256 \).

Answer:

\( 1256.0 \)