Three pieces of silver have masses `2.3kg, 41.15g` and `30.19g`. The toal mass fo correct significant figures in (in kg)

Three pieces of silver have masses 2.3 kg, 41.15g and 30.19g. The total mass of correct significant figures is

The mass of a box is 2.3 kg . Two marbles of masses 2.15 g and 12.39 g are added to it . Find the total mass of the box to the correct number of significant figures.

The mass of a box is 2.3 kg . Two marbles of masses 2.15 g and 12.39 g are added to it . Find the total mass of the box to the correct number of significant figures.

The mass of a box measured by a grocer's balance is 2.300kg .Two gold pieces of masses 20.15g and 20.17g are added to the box.What is the total mass of the box and the difference in the masses of the pieces to correct significant figures