`A\ a n d\ Q` together can do a piece of work in 10 days, `Q\ a n d\ R` can do the same work together in 12 days, while `A\ a n d\ R` can do together in 15 days. How long each will take to do it separately?

Explanation

To solve the problem step by step, we need to determine how long each person (A, Q, and R) will take to complete the work individually. We have the following information:

1. A and Q together can complete the work in 10 days.
2. Q and R together can complete the work in 12 days.
3. A and R together can complete the work in 15 days.

### Step 1: Determine the work done by each pair in one day
- Work done by A and Q in one day = \( \frac{1}{10} \)
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