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meriva
2 years ago
11

One student can paint a wall in 12 minutes. Another student can paint the same wall in 24minutes. Working together, how long wil

l it take for them to paint the wall?
Mathematics
1 answer:
jek_recluse [69]2 years ago
4 0

Answer:

8 minutes.

Step-by-step explanation:

We work in fractions of the wall they can paint in 1 minute, so

1/12 + 1/24 = 1/x  where x is the time it takes when working together.

Multiplying through by 24x:

2x + 1x = 24

3x = 24

x = 8 minutes.

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