Mrs. Davis bought 6 pounds of grapes for 18 dallors at this rate how much would 72 ounces of grapes have cost

Cost of 72 ounces of grapes is $13.5

Step-by-step explanation:

In order to solve his problem, we first need to get all the values in the same units.

1 pound = 16 ounces

∴ 6 pounds = 16*6 = 96 ounces

Now by unitary method, we solve the question as follows:

price of 96 ounces of grapes = $ 18

price of 1 ounce of grapes = $ (18:96)

∴ price of 72 ounces of grapes = $ [ (18:96) * 72]

= (0.1875*72) = $ 13.5