Question

If it took 2/5 gallon of paint to cover 282 square feet of wall in Tom’s garage, how much more paint will he need to paint an additional 423 square feet of wall?

Answer 1

3/5 gallons of more paint

Step-by-step explanation:

Given:

Paint required for 282 square feet of area = 2/5 gallon = 0.4 gallons

thus,

by applying the concept of unitary method we have

paint required for 1 square feet of area = (0.4 gallons)/282

therefore,

the paint required for 423 square feet of area =
`(0.4)/(282)* 423` gallons

or

the paint required for 423 square feet of area = 0.6 gallons =
`(6)/(10)=(3)/(5)` gallons

hence, 3/5 gallons of more paint will be required.