1.

Two cubical blocks identical in dimensions float inwater in such a way that 1st block floats with halfpart immersed in water and second block floats with3/4 of its volume inside the water. The ratio of densitiesof blocks is(2) 3:4

Answer»

Take equal volume of A and B, say V.Weight of A = Weight of V/2 volume of water.Similarly, weight of B = Weight of 3V/4 volume of water.As density is weight per unit volume, the required ratio will beD(A)/D(B)=(V/2)/(3V/4) =3/4Thus, density of A : density of B = 2:3



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