The mass and volume of a body are 4.237 g and 2.5 cm3 respectively. The density of the material of the body in correct significant figures is: a) 1.6048 g/cm3 b) 1.69 g/cm3 c) 1.7 g/cm3 d) 1.695 g/cm3
Correct option is C) Here, mass, m=4.237g Volume, V=2.5cm3 We know the formula Density, ρ=VolumeMass =2.5cm34.237g=1.6948gcm−3 As the mass has 4 significant figures and volume has 2 significant figures, therefore, as per rule, density will have only two significant figures. Rounding off to two significant figures, we get, ρ=1.7gcm−3
