Strength of Materials
A sample of metal weighs 219 gms in air, 180 gms in water, 120 gms in an unknown fluid. Then which is correct statement about density of metal

metal is twice as dense as unknown fluid
density of metal can’t be determined
metal will float in water
metal is twice as dense as water

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Strength of Materials
If a rigid body is in equilibrium under the action of three forces, then

the lines of action of these forces meet in a point & the lines of action of these forces are parallel
these forces are equal
the lines of action of these forces meet in a point
the lines of action of these forces are parallel

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