A carpenter can do a job in two hours. His assistant can do the same job in three hours. How long would it take them to do the job together?

Question

Miranda Aguirre

Mathematics

17 August, 17:31

A carpenter can do a job in two hours. His assistant can do the same job in three hours. How long would it take them to do the job together?

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Answers (2)

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Ricardo Gamble · Answer 1

Ricardo Gamble 17 August, 17:36

0

Answer:the answer is 2.4 hours

Cadence Frederick · Answer 2

The carpenter makes 1/4 of the job per hour.

The assistant makes 1/6 of the job per hour.

When they work together, they make 1/4 + 1/6 = 6/24 + 4/24 = 10/24 = 5/12 of the job each hour.

Thus, it will take 12/5 = 2 2/5 hours = 2 hours and 24 minuets for them to finish the job working together.