Question

One person can do a certain job in ten minutes, and another person can do the same job in fifteen minutes. How many minutes will they take to do the job together?

Answer 1

Hint: Pretend that the first person is a man and the second person is a woman. Then:

\(\large\frac{M \times W}{M + W}\)

Answer 2

Okay...

Answer 3

Thus:

\(\large\frac{10 \times 15}{10 + 15}\)

Answer 4

150/25=6

Answer 5

So they can both do the job in 6 minutes.

Answer 6

Yes!!! Thank you!