A body moves at a speed of `100 ms^(-1)` for `10 s` and then moves at a speed of `200 m s^(-1)` for `20 s` along the same direction. The average speed is …………………………….,

Explanation

To find the average speed of the body, we can follow these steps:

### Step 1: Calculate the distance traveled during the first interval.
The body moves at a speed of \(100 \, \text{m/s}\) for \(10 \, \text{s}\).

\[ \text{Distance}_1 = \text{Speed}_1 \times \text{Time}_1 = 100 \, \text{m/s} \times 10 \, \text{s} = 1000 \, \text{m} \]
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