Question

Need help on both these questions please thank you

Answer 1

Remember that the volume of a cone is $1/3 \pi r^2h$
Thus;

1. 2^2 = 4
4pi(7) = 28pi
28/3 = $9 \frac{1}{3}$
ANS = $9 \frac{1}{3} \pi$ or ~29.32

2. d = 18, r = 9
9 ^ 2 = 81
81pi (18) = 1458pi
1458 / 3 = 486
ANS = $486 \pi$ or ~1526.81