Question

Nathan Alexander wants to purchase ears of corn for a family reunion picnic. A farmers’ market near his home offers six ears of corn for $1.25, 12 ears of corn for $2.64, or 36 ears of corn for $7.20. Which is the best buy? All the ears of corn are the same price. 12 ears for $2.64 6 ears for $1.25 36 ears for $7.20

Answer 1

The best buy is 36 ears of corn for $7.20, because it is 20 cents per ear of corn 

Answer 2

Answer: 36 ears for $7.20 is the best buy as it is cheapest among them.

Explanation:

Since we have given that

Cost of 6 ears of corn = $1.25

Cost of 12 ears of corn = $2.64

Cost of 36 ears of corn = $7.20

In above cases, we will find the cost of unit ear to get the best buy.

By using "Unitary method":

Ist case :

Cost of 1 ear of corn is given by

`(1.25)/(6)=\$0.21`

IInd case :

Cost of 1 ear of corn is given by

`(2.64)/(12)=\$0.22`

III rd case:

Cost of 1 ear of corn is given by

`(7.20)/(36)\\\\=\$0.20`

Hence, 36 ears for $7.20 is the best buy as it is cheapest among them.