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Q.

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

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a

XY

b

X+Y2

c

X2+Y22

d

2X2+Y2

answer is B.

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Detailed Solution

S1 → weight of scale panS2 → weight of weight panAccording to question(W + S1) a = (X + S2) aand (Y + S1) a = (W + S2)a⇒W=X+Y2
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