Question

Type the correct answer in the box. Use numerals instead of words.

Lily runs a painting business. She has two experienced interior painters. One painter can paint a 300-square-foot room in 200 minutes.
The other worker can paint a 300-square-foot room in 300 minutes.
If the painters work together, they can paint a 300-square-foot room in
minutes.​

Answer 1

Step-by-step explanation:

Use this formula:

= of a room per minute.

Find the combined rates of the painters:

+ = .

Find a common denominator:

+ = .

Then find the reciprocal of the new equation:

=

= x

x = 120 minutes

Answer 2

Both experianced interior painters can paint a 300-square-foot room in 250 minutes.​

Step-by-step explanation:

First interior painter can paint a 300-square-foot room in 200 minutes while the other interior painter can paint a 300-square-foot room in 300 minutes. If the work is evenly distributed, the first painter finish his work earlier that the second painter. The first painter can paint 150 square foot room in just 100 minutes while the second painter can paint 150 square foot room in 150 minutes so the work will be done in 250 minutes.