A rectangular prism is truncated removing 10% of its height. The original height of the prism was 100 meters and it has a length of 4 meters and a width of 20 meters. What is the volume of the truncated prism?
Answer
3,800 m^3
7,200 m^3
800 m^3
4,200 m^3
I say the answer is C.

Question

A rectangular prism is truncated removing 10% of its height.  The original height of the prism was 100 meters and it has a length of 4 meters and a width of 20 meters.  What is the volume of the truncated prism?
Answer
		3,800 m^3
		7,200 m^3
		800 m^3
		4,200 m^3
I say the answer is C.

espex · Answer

Your original height was 100, you lost 10% of that. 10%/100% = 0.1, 0.1* 100 = 10
Then you lost 10 meters from your original height.
The volume of a rectangular prism is length*width*height:$$(100-10)*4*20=V$$