Concrete
Loose sand
Asphalt
Firm earth
Answer is Right!
Answer is Wrong!
The correct answer is B. Loose sand.
Loose sand is the surface that will give the highest rolling resistance for a rubber tyred vehicle. This is because the sand particles are not tightly packed together, so there is a lot of space between them. This space allows the tyres to sink into the sand, which makes it more difficult for the vehicle to move forward.
Concrete is a hard, smooth surface that offers very little resistance to rolling tyres. Asphalt is a bit softer than concrete, but it is still a relatively smooth surface. Firm earth is also a relatively smooth surface, but it is not as smooth as concrete or asphalt.
Therefore, loose sand is the surface that will offer the most resistance to rolling tyres.