Question

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 1

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 =$(2xx10^(1))/10^(-5) = 2xx10^(4) " kg "m^(-3)$