A cyclist moves with a speed of 30km/hr in the first 10 minutes, with speed of 15km/hr in the next 20 minute and with a speed of 40km/hr in the last 15 minutes Calculate the average speed of the cyclist.

Explanation

To calculate the average speed of the cyclist, we will follow these steps:

### Step 1: Convert Time from Minutes to Hours
The time for each segment of the journey is given in minutes. We need to convert these times into hours since the speed is given in km/hr.

- For the first segment:
\[
t_1 = 10 \text{ minutes} = \frac{10}{60} \text{ hours} = \frac{1}{6} \text{ hours}
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