Question

why do the load carrying heavy vehicles have large number of wheels​

Answer 1

So, the load carrying heavy vehicles have large number of wheels so that the pressure on the road is reduced due tolarger contact area. Also, using large number of wheels ensures that the force due to the load is shared among thetyres and no single tyre is under stress.

Answer 2

Answer:

to reduce the pressure of the load by making the surface area more

hope it helps