Time for 20 oscillations of a pendulum is measured as `t_1=39.6s`,`t_2=39.9` and `t_3=39.5s`. What is the precision in the measurements ? What is the accuracy of the measurement ?

Explanation

To solve the problem, we need to determine the precision and accuracy of the measurements of the time taken for 20 oscillations of a pendulum. The measurements provided are \( t_1 = 39.6 \, s \), \( t_2 = 39.9 \, s \), and \( t_3 = 39.5 \, s \).

### Step 1: Determine the Precision of the Measurements
Precision is defined as the smallest division of the measuring instrument, also known as the least count. In this case, since the measurements are given to one decimal place, the least count is:

\[ \text{Precision} = 0.1 \, s \]
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