Question

why are catter pillar tracks used in battle tanks instead of tyres

Answer 1

Battle tanks use caterpillar tracks to spread their heavy weight on soft ground. this prevents the sinking of land under the weight of the tank . ( as more the surface area less the pressure )

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Answer 2

Explanation:

Heavy tanks have broad chain called caterpillar tracks  which considerably increase the area of contact. The pressure on the tanks is therefore much less than if it had tyres . This prevents it from sinking in terrain such as marshy land where wheeled vehicles of the same weight would sink.