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10. A false balance has equal arms. An object weigh X when placed in one pan and Y when placed in other pan, then the weight W of the object is equal to

(a)     √X Y

(b) X + Y / 2

(c) X2 + Y2 / 2

(d) 2 / √X2 + Y2 / 2

Ans. b

(10)

5/5 - (4 votes)

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