Car crosses the first third of the road with unknown speed and the rest of the road with the speed of 50 km/h. what is the the speed in the first third if the average speed of a car is 30km/h?

40 km/h because the average of 50 and 30 is 40

Texture and composition are different because they are not the same aspect. texture has to do with feel and so on, where as composition is the chemical makeup which you cant touch like you can texture.