4 men or 5 women can construct a wall in 82 days. How long will it take for 5 men and 4 women to do the same ?

Explanation

To solve the problem step by step, we can follow these instructions:

### Step 1: Understand the given information
We know that:
- 4 men or 5 women can construct a wall in 82 days.

### Step 2: Find the work done by men and women
Let's denote the work done by 1 man in one day as \( M \) and the work done by 1 woman in one day as \( W \).
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