can anybody solve it ??
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Answer:
22N
Explanation:
As the block is immersed in the beaker, it experiences bouyant force which decrease the reading of spring balance by 2N. Applying Newton's 3rd law, a 2N force will be applied by the block on the beaker. Hence the reading of weighing machine increases by 2N. Therefore, 20+2 = 22N
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