3 Goes out in a straight line 4 A concrete sphere of radius R has...

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3 Goes out in a straight line 4 A concrete sphere of radius R has a cavity of radius r which is packed with of concrete and sawdust are respectively 2 4 and 0 3 for this sphere to float with its entire volume submerged under water The ratio of mass of concrete to mass of sawdust will be 3 3 2 4 1 8 4 Zero 5 A wire elongates by I mn when a load W is hung from it If the wire goes over longation of the wire will be in mm a pulley and two weights 1 21

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