Radius = Diameter ÷ 2
Radius = 10 ÷ 2 = 5
.
Volume = πr²h
Volume = π(5)² (20) = 500π cm³
Answer: 500π cm³
Answer:2.5
Step-by-step explanation:
Answer:
144 people were originally at the party.
18 boys is one fifth of the second boys population, so the second population is 18x9 = 162. The original population would be 162-18, which equals 144.
