In an experiment with a beam balance, an unknown mass 
is balanced by two known masses of 16 kg and 4 kg, as shown in figure. The value of the unknown mass 
is
(1) (2)
Text Solution
Verified by ExpertsThe correct answer is:
C
From figure (1),
… (i)
From figure (2),
… (ii)
From Eqs. (i) and (ii),
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