Two cars `A` and `B` are moving on the straight parallel paths with speeds `36 km h^(-1)` and `72 km h^(-1)` respectively starting from the same point in the same direction. After `20 min`, how much behind is car `A` and from car `B`?

Explanation

To solve the problem of how far behind car A is from car B after 20 minutes, we will follow these steps:

### Step 1: Convert the speeds from km/h to km/min
Car A's speed is given as 36 km/h. To convert this to km/min:
\[ \text{Speed of A} = \frac{36 \text{ km/h}}{60 \text{ min/h}} = 0.6 \text{ km/min} \]

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