Answer:
As Per Provided Information
- Distance covered by his car 225 Km
- Time taken by his car 7.5 hours
We have to determine the average speed of his car in kilometres per hour .
Using Formulae
![\boxed {\bf \: Average\: Speed \: = \cfrac{Total \: Distance \: Covered}{ Total \: Time \: Taken }}](https://img.qammunity.org/2023/formulas/mathematics/high-school/yfq0vp78h228fjvq77jn6zs5osk68x8egf.png)
On substituting the value we get
![\sf \qquad \: \longrightarrow\: Average\: Speed \: = \cfrac{225}{7.5} \\ \\ \\ \sf \qquad \: \longrightarrow\: Average\: Speed = \cancel \cfrac{225}{7.5} \\ \\ \\ \sf \qquad \: \longrightarrow\: Average\: Speed = 30km {h}^( - 1)](https://img.qammunity.org/2023/formulas/mathematics/high-school/s7mmkislio7aesjti3a30y5dlfx9s1d4s4.png)
Therefore,
- Average speed of his car is 30 km/h .
So your answer is A) 30 kph .