A right rectangular prism has a volume of 40 cm3. Find the new volume of the prism if only the length of the prism is doubled.

Well we know that:

Volume = l*w*h

so that means:

40 = l*w*h

Well if the length is doubled that means

New Volume = 2l*w*h or

New Volume = 2*l*w*h

Well since we know from our original equation that 40 = l*w*h, we can substitute it into this new volume equation

New Volume = 2*l*w*h

New Volume = 2 * (40)

New volume = 80 cm³