To calculate the time it takes to drive a certain distance at a given speed, you can use the formula:
Time = Distance / Speed
In this case, the distance is 30 km and the speed is 80 km/hr. Plugging in these values into the formula:
Time = 30 km / 80 km/hr
Simplifying the expression:
Time = 0.375 hr
To convert this to minutes, we can multiply by 60:
Time = 0.375 hr * 60 min/hr
Time = 22.5 min
Therefore, it would take approximately 22.5 minutes to drive 30 km at a speed of 80 km/hr.