Which box gives you more cereal for your money? First, solve for the volume of each box of cereal. FORMULA SHEET Second, find the UNIT PRICE for each box. PRICE/Cubic Inch. DO NOT ROUND. WRITE OUT ALL OF THE DECIMALS. Third, compare the prices. Which box of cereal is cheaper per cubic inch?

Question

Volume Box A = in3 Volume Box B = in3 Box APrice per cubic unit ($in3)=$ per in3 Box BPrice per cubic unit ($in3)=$ per in3 Which box is cheaper per cubic unit? Type A or B

(the first box is 16in 4in 10in) (and the second is 2in 10in 8in)

Answer 1

Volume Box A = 16in x 4in x 10in = 640in3
Volume Box B = 2in x 10in x 8in = 160in3

If the price of Box A is $20 and the price of Box B is $5, then:
Price per cubic inch for Box A = $20 / 640in3 = $0.03125/in3
Price per cubic inch for Box B = $5 / 160in3 = $0.03125/in3

Both boxes have the same price per cubic inch, so they are equally cheap.