Diana has made a foam ramp for her pet dog (as shown in diagram).
What is the volume of foam, in cubic inches, required to make the ramp?

Question

Diana has made a foam ramp for her pet dog (as shown in diagram).
What is the volume of foam, in cubic inches, required to make the ramp?

anonymous · Answer

attachment

callisto · Answer

volume = uniform cross section area x height
            = [(1/2) x 18 x24] x 12
            = 216 x 12
            =  can you work out the answer yourself?

anonymous · Answer

Thank you ^^

callisto · Answer

welcome. do you understand it?

anonymous · Answer

I think so. But I used the formula v = 1/3 base times height, and it gave me a completely different answer from yours...

callisto · Answer

1/3 is used for 'pyramid'

anonymous · Answer

Is it not a pyramid?

callisto · Answer

well, your question show a prism with uniform cross section area.
So the formula used is base area times height, where the base area should be the cross section area

callisto · Answer

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(a) is a prism and (b) is a pyramid

callisto · Answer

For a , you can find uniform cross section area, but you cannot find that in (b)
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