Question

Trucks meant to carry heavy loads have eight tyres instead of four

Answer 1

ya you are correct bcz higher the pressure in the tyre the it Will be more easy to carry the load

Answer 2

trucks have eight tyres instead of four. this is because pressure is inversely proportional to the area. due to the increase in area with the help of eight tyres the pressure on the groud decreases and prevent sinking of truck into ground