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12.A cube of edge length 10 cm is just balanced at the interface of two liquids A and B asand B has specific gravity 0.6 and 0.4 respectively, then mass of cube isshown in figure. If A(2) 360 g(1) 240 g(3) 480 g(4) 540 g

Answer»

Balance the force in vertical direction.

=> mg = (pVg)1 + (pVg)2

So,m = (0.4 g/ml)600cm³ + (0.6 g/ml)(400 cm³) as 1 ml = 1 cm³ so m = 480 gm.

Hope it clears.



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