Question

What is the weight of a bowling ball with a 5 in. radius if we know that one cubic inch weighs 1/100th of a pound?

A. 9.86 lb.
B. 5.24 lb.
C. 6.54 lb.
D.10.99 lb.

Answer 1

Greetings!

To find the total area of the bowling ball, which we presume is spherical, the equation is:

`(4)/(3)`πr³

So we know that the radius is 5, so we can substitute that into the equation:

`(4)/(3)` x π x 5³ = 523.599 or 524 to 1dp.

Seeing as this is 524 cubic inches, we can convert this into pounds by dividing this by 100, because one cubic inch weights
`(1)/(100)` as stated.

524 ÷ 100 = 5.24lb

So your answer would be B, 5.24lb.

Hope this helps!