Question

why are double tyres provided at the rear wheel of truck?
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Answer 1

Answer:

there are two tyres at the rear of truck beacuse

the truck travel long distance with heavy load

because their is pressure on tyre

because of this pressure is there are chances of bursting of tyre

so at this time two tyres help

if any of two tyres get burst then second one helps in balancing the truck.....

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Answer 2

Answer:

double tyres are provided at the rear wheel of truck to increase the surface area and hence reduce pressure .

Explanation:

This is done to reduce the pressure on the wheels of truck as it carries heavy load . As we know , pressure is inversely proportional to surface area , so we increase surface area to decrease the pressure on it to make it work more effectively and safely.

Hope it helps