1.

The readings in a graduated cylinder are`10 cm^(3)` and` 20 cm^(3)`, respectively, before and after a metal alloy piece of mass 200 g is put in it. Thedensity of the material of the alloy is `"________"`kg `m^(-3)`A. (a)` 2xx 10^(3)`B. (b) 2xx10^(4)C. (c ) `2xx10^(5)`D. (d) 2xx 10^(6)`

Answer» Correct Answer - B
Volume of the metal = `10 cm^(3)`
=`10xx10^(-6) m^(3) = 10^(-5) M^(3)`
Mass of the metal = 200 g = 0.2 kg
Density = mass/volume =`(2xx10^(1))/10^(-5) = 2xx10^(4) " kg "m^(-3)`


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