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One student can paint a wall in 12 minutes. Another student can paint the same wall in 24 minutes. Working together, how long will it take for them to paint the wall?
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One student can paint a wall in 12 minutes. Another student can paint the same wall in 24 minutes. Working together, how long will it take for them to paint the wall?

User Rich Randall
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2 Answers

2 votes

Answer: 8

Explanation:

User Can Karabag
by
8.7k points
4 votes
Student 1 can paint 1/12 of the wall per minute.
Student 2 can paint 1/24 of the wall per minute.

1/12t+ 1/24t= 1 where t represents time in minutes.
3/24t=1

Divide both sides by 3/24
t=24/3
t=8

Final answer: 8 minutes
User Hux
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8.1k points
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