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The two arms of a balanced are of unequa...

The two arms of a balanced are of unequal length. An object when placed in the left pan of the balance weighs 4 kg. The same object when placed in the right pan of the balance weighs 9 kg. The actual (or) true mass of the object is

A

5.5 kg

B

6 kg

C

6.5 kg

D

7 kg

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