a man digging a pit found that he could dig with ease initially but digging became difficult as he went deeper.he could not dig beyond a depth of 5 feet.provide a suitable scientific explanation.
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our earth's crust is made up of various layers of soil as we get deerer the we reach the rocks.these are the rocks which under constant weathering turns into soil so after digging the topsoil thje person reaches the rocks and it gets tougher as we dig it more
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