Question

Corey bought 2 1/2 liters of paint for$60

what was the cost per liter of paint.

Answer 1

if 2 1/2 liters of paint cost $60 then 1 liter cost $24

Answer 2

we know that

Unit Rate is the ratio of two measurements in which the second term is
`1`

we have

`2(1)/(2)\ liters=(2*2+1)/(2)=(5)/(2)\ liters`

so

Corey bought
`(5)/(2)\ liters` of paint for
`\$60`

by proportion

Find the cost of one liter of paint

`(60)/((5/2))(\$)/(liters)=(x)/(1)(\$)/(liters) \\ \\x*(5)/(2)=60\\ \\ x=2*60/5\\ \\x=\$24`

therefore

the answer is

the cost per liter of the paint is equal to
`24(\$)/(liter)`