Question

At a coffee shop you can buy coffee in a paper cup for $1.50 or in a

refillable ceramic mug for $6. Refills of the ceramic mug are $1. How
many refills do you need to buy to make buying the mug a better value
then buying individual paper cups of coffee? *

Answer 1

Given :

Coffee cost in a paper cup , $1.50 .

Coffee cost in a cremic mug , $6 .

Refills of the ceramic mug are $1 .

To Find :

How many refills do you need to buy to make buying the mug a better value

then buying individual paper cups of coffee.

Solution :

Let , number of fills to make mug better option is x .

So , money spend in mug in greater than paper cup .

`1.5x6+1x\\\\0.5x>6\\\\x>12`

Therefore , after 12 cups of coffee, ceramic mug will have better value than paper cups .

Hence , this is the required solution .