A train first travels for 30 min with a velocity 30 km `h^(-1)` and then for 40 min with a velocity 40 km `h^(-1)` in the same direction, Calculate : (i) the total distance travelled, (ii) the average velocity of the train.

Explanation

To solve the problem step by step, we will calculate the total distance traveled by the train and then find the average velocity.

### Step 1: Convert time from minutes to hours
The train travels for two different time intervals:
- First interval: 30 minutes
- Second interval: 40 minutes

We need to convert these times into hours because the velocities are given in km/h.
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