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 will follow these steps:

### Step 1: Identify the Measurements
We are given three measurements of time for 20 oscillations of a pendulum:
- \( t_1 = 39.6 \, \text{s} \)
- \( t_2 = 39.9 \, \text{s} \)
- \( t_3 = 39.5 \, \text{s} \)

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