Question

Help pls!!!!!!

A family sized box of cereal with dimensions 3x9x12 inches costs $6, while the regular size with dimensions 2x8x9 inches costs $4.50. What is the difference in price per cubic inch?

Answer 1

Volume of family sized box

• LBH
• 3(9)(12)
• 27(12)
• 324in³

Price per inch

• 6/324=0.02$/in

Volume of regular size

• 2(8)(9)
• 144in³

Price per in

• 4.5/144=0.03$/in

Difference:-

|0.02-0.03|=0.01$

Answer 2

$0.01

Explanation:

Family size rate (per cubic inch)

• Volume of box = 3 x 9 x 12 = 324 in³
• Cost = $6
• Rate = 6/324 = 1/54 = $0.02 per cubic inch

Regular size rate

• Volume of box = 2 x 8 x 9 = 144 in³
• Cost = $4.50
• Rate = 4.50/144 = 1/32 = $0.03 per cubic inch

Difference in price

• $0.03 - $0.02
• $0.01