The circumference of a beach ball is 55cm. Determine the volume of the beach ball.

Question

Round to nearest cube centimetre.

 

Answer 1

r = radius

 

C = circumference = 2πr = 55 cm

 

r = C/(2π)

 

V = (4/3)πr³ = (4/3) π [C/(2π)]³ 

 

Now plug in C = 55 cm, and get the volume in cm³.  You should be able to finish from here.