Average speed of the car is defined as the ratio of total distance and total time
So here we will have

now we know that

time = 5 h
now from above equation we will have

so the average speed will be 90 km/h
Fixed volume and shape
-Particles are locked into place
Not easily compressible
-Little free space between particles
Does not flow easy
-Particles cannot move past each other
Answer:
Moment of inertia of Earth about its own axis is given as

Explanation:
Since Earth is considered as solid sphere
So we will have

so we will have

so we have
