A car covers a distance of 30 km and 250 metres in 25 minutes. The speed of the car in km per hour is _____.

Correct option is C

Given:
Distance covered = 30 km 250 meters 
Time taken = 25 minutes
Formula Used:
Speed = Distance / Time
Solution:
Distance in km = 30 km 250 meters = $$= 30 + \left(\frac{250}{1000}\right) = 30.25 \, \text{km} \\$$​​
Time in hours =$$= \frac{25}{60} = \frac{5}{12} \, \text{hours} \\$$​​
Speed = $$= \frac{30.25}{\frac{5}{12}} = 30.25 \times \frac{12}{5} = 72.6 \, \text{km/hr}$$​