Question

A room covers 299.6 square feet. A painter paints the room in three days. The first day he covers 2/7 of the area. The next day he covers twice as much. How many square feet does he cover on the last day?

Answer 1

128.4 feet

is the answer

Answer 2

On day the he covers 128.4 ft²

Explanation:

Lets first figure out how much he has done so far

To figure out how much he does we can use a proportion

Set up a proportion for first day

2/7 = x/299.6

Solve the proportion

2×299.6÷7 = 599.2/7 = x

x = 85.6

He covered 85.6 sq/ft on day 1

Find day two

85.6 * 2 = 171.2

Find how much is left to do on day 3

299.6-171.2 = 128.4 ft²