Tow card are moving in the same direction with the same speed `30 km //h^(-1)` . They are separated by a distance of 4 km. What is the speed of a car moving in the opposite driection if it meets these two card at an interval if ` 5 mimutes.

Explanation

To solve the problem step by step, we can follow these instructions:

### Step 1: Understand the problem
We have two cars moving in the same direction at a speed of 30 km/h, separated by a distance of 4 km. We need to find the speed of a third car moving in the opposite direction that meets the two cars at an interval of 5 minutes.

### Step 2: Convert the time interval
The time interval between the two meetings is given as 5 minutes. We need to convert this into hours since the speeds are given in km/h.
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