Algebra 3 word problem

Question

The head of the bass drum used by Purdue university marching band has a radius about 4 times greater than a common bass drum how many times greater is the area of Purdue bass drum than a common bass drum head ? Let r represent the radius of a common bass drum

Answer 1

Okay, the first thing you need to remember is that the area of a circle is πr^2.

 

So, since the radius is 4 times bigger, we can see that the area will be 4 squared times bigger.

 

In other words, the area will be 16 times bigger.