Question

1. Why do you think the rock is harder inside
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Answer 1

Answer:

The outer covering gets weathered day by day and therefore becomes porous and weak. The ineer rock is well protected and therefore does not gets weathered and hence does not become weak.

Answer 2

hey mate here is your answer:

The outer covering gets weathered day by day and therefore becomes porous and weak.

The inner rock is well protected and therefore does not gets weathered and hence does not become weak

hope this helps you...