Rubber tyres are perferred to steel tyres . Why ?

Tyres are grooved to

Tyres are grooved to

Why are ruber tyres preffered to iron tyres?

Why carts with rubber tyres are easier to ply, than those with iron tyres?

Stainless steel cooking pans are perferred with extra copper bottoms. Why?

"Carts with rubber tyres are better than those with iron tyres". Why ?

A steel tyre of 1.2 m inner diameter at 20^@C is to be fitted on a cartwheel of 120.33 cm diameter of the tyre. Calculate the temperature to which the steel tyre is to be raised so that it will just slip on the wheel. (alpha_(Steel) = 11 xx 10^-6//^@C)