Question

A snare drum has diameter fourteen inches. A bass drum has diameter thirty-six inches. What is the difference in the areas of the two drums?

sixty-nine point zero eight square inches

four hundred eighty-four square inches

eight hundred sixty-three point five square inches

three thousand nine hundred fifteen point five eight square inches

Answer 1

ok... so the area of a circle is

\[A = \pi r^2\]

snare has a radius or 7 inches

bass a radius of 18 inches

to the difference in area is

\[Diff = \pi \times 18^2 - \pi \times 7^2\]

Answer 2

Ok so which one is it?