Question

a certain color paint should have a mix of blue and green and a ratio of 5:2 if a house painter needs to use 8 gallons of green paint how many gallons of blue paint should he mix with it in order to obtain the right color

Answer 1

20 Gallons

Explanation:

blue:green

5:2

Green paint is 8 gallons

Plug 8 gallons into the ratio and get...

20:8

There are 20 gallons of blue paint

Answer 2

He needs 20 gallons of blue paint in order to obtain the right color.

Explanation:

A certain color paint should have a mix of blue and green and a ratio of 5:2

i.e. he needs to mix 5x quantity of blue paint and 2x quantity of green paint

A house painter needs to use 8 gallons of green paint.

⇒ 2x=8 gallons

⇒ x=4 gallons

So, He needs 5×4 gallons of blue paint

i.e. He needs 20 gallons of blue paint in order to obtain the right color.