Question

buses and trucks have wider wheels than cars . some of them also have double wheels at back. can you explain why?​

Answer 1

Answer:

Trucks and buses generally have double wheels at the back to increase the area of contact on which their weights acts and hence reduces the pressure on the ground.

Answer 2

Answer:

The trucks and buses have wider tyres with respect to the property that " more the area, less the pressure". As the area is more the pressure will decrease, so there will be less need for applying more pressure to handle the vehicle.