1.The formula of the volume of a pyramid is ______________.
a. 1/3 x l x w x h
b. 1/3 x l x w
c. l x w x h
2.What is the volume of a sphere whose radius is 6 cm?
a. 904.32cm3
b. 914.32cm3
c. 924.32cm3
d. 934.32cm3
3.Which of the following is the formula for the volume of a cone?
a. 4/3 π r3
b. 1/3 x l x w x h
c. 1/2 π r2 x h
d. 1/3 π r2 x h​