Question

HELLO HI HELP ME WITH NUMBER 7 PLEASE I GIVE BRAINIEST ​

Answer 1

base area = pi r2

9 pi = pi r2

9=r2

r= root 9

radius = 3cm

vol = 1/3pir2h

1/3pir2h=12pi

height =4cm

slant height = root ( r2+h2)

9+16=25 root 25 =5

slant height = 5cm

surface area = pir(r+(rooth2+r2))

=75.4cm2