A rectangular pyramid fits exactly on top of a rectangular prism. The prism has a length of 12 in., a width of 4 in., and a height of 5 in. The pyramid has a height of 10 in. Find the volume of the composite space figure.
480 in.3
300 in.3
2400 in.3
400 in.3

Question

A rectangular pyramid fits exactly on top of a rectangular prism. The prism has a length of 12 in., a width of 4 in., and a height of 5 in. The pyramid has a height of 10 in. Find the volume of the composite space figure.  
480 in.3
300 in.3
2400 in.3
400 in.3

inkyvoyd · Answer

What part are you having trouble with?

inkyvoyd · Answer

@inkyvoyd

inkyvoyd · Answer

To find the volume of the figure, add up the volume of the pyramid and the rectangular prism. The volume of hte rectangular prism is not too difficult - want to find it?

anonymous · Answer

12*4*5=240^2

inkyvoyd · Answer

Now, imagine the pyramid. it has a length of 12, and a width of 4.

inkyvoyd · Answer

From the question, we are also given the height of the pyramid as well. What is it?

anonymous · Answer

10in! :D

inkyvoyd · Answer

mmhmm - so, how does one find the area of a pyramid?

anonymous · Answer

(cricket cricket)

inkyvoyd · Answer

V=1/3 BH - it's one of those formulas you have to memorize.
What is the area of the pyramid base?

anonymous · Answer

...

inkyvoyd · Answer

volume of a pyramid equals one-third base times height

inkyvoyd · Answer

does tha make sense to you?

anonymous · Answer

How do I find the base of it?