Question

PLEASE HELP!! THIS IS MY LAST QUESTION!! WILL GIVE BRAIN!!

Answer 1

0.60 cm increase in volume

Explanation:

200/Pi(30) = r^2 = 2.12

r = 1.46

400/Pi(30) = new r^2 = 4.24

new r = 2.06

2.06-1.46 = 0.60 cm