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The mass of a box is 2.3 kg. Two marbles...

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.

Text Solution

Verified by Experts

In the case of addition, we always express our result in the least precise measurement, which in our case is 2.3 kg and has two significant digits. Hence, the total mass should be expressed in two significant digits.
Mass of the box = 2.3 kg
Mass of the first marble stone = 2.15 g = 0.00215 kg.
Mass of the second marble stone = 12.39 g = 0.01239 kg
Total mass of the box is
`{:(,2.3),(+,0.00215),(+,ul0.01239),(,ul2.31454):}`
Hence, the correct mass of the box in correct significant digits is 2.3 kg.
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