The mass of a box measured by a grocer's balance is 2.3 kg

unitsandmeasurement
cbse

#1

The mass of a box measured by a grocer’s balance is 2.3 kg. Two gold pieces of masses. 20.15 g and 20.17 g are added to the box. What is (a) the total mass of the box, (b) the difference in the mass of the pieces to corrects significant figures ?


#2