Question

a spherical fish bowl has a radius of 21 cm.how many ml of water is needed to fill the half of the bowl?

Answer 1

do you remember the formula for the volume of a sphere?

Answer 2

V=(4/3)pi*r^3 is the volume for sphere
V=(2/3)pi*r^3 for hemisphere
now you substitute the given r to the volume formula for hemisphere and you'll get the volume

Answer 3

for conversion:
\[1 cm ^{3} = 1 ml\]