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

$2\frac{1}{2}\ liters=\frac{2*2+1}{2}=\frac{5}{2}\ liters$

so

Corey bought $\frac{5}{2}\ liters$ of paint for $\ 60$

by proportion

Find the cost of one liter of paint

$\frac{60}{(5/2)}\frac{\ }{liters}=\frac{x}{1}\frac{\ }{liters} \\ \\x*\frac{5}{2}=60\\ \\ x=2*60/5\\ \\x=\ 24$

therefore

the answer is

the cost per liter of the paint is equal to $24\frac{\ }{liter}$