The model of a new apartment building is 10 in, x 28 in x 18 in. the architect plans for the new building to be 144 times the size of the model. What will the volume and surface area of the new building be when it is completed?

10 x 18 x 28 = 5040 x 144^3 divided by 12 =1254113280ft, but the answer is 8,709,120 ft^3, and i don't understand how they got it, didn't even get to surface area

2 answers

you need to divide by 12^3 to get it into feet^3, not divide by 12.

volume=5040*144^3(1/12^3)=5040(12^3)
How do you get the surface area?