A body covers a distance of 15 m in the 5th second and 20m in the 7th How much it will cover in the 12th second?

Explanation

To solve the problem of how much distance a body will cover in the 12th second, given that it covers 15 m in the 5th second and 20 m in the 7th second, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Formula**:
The distance covered by a body in the nth second can be calculated using the formula:
\[
S_n = u + \frac{a}{2} (2n - 1)
...