Illustration: 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.

2 kg

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2.310 kg

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2.31 kg

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2.3 kg

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Solution

The correct option is D
2.3 kg

Total mass = 2.3 + 0.00215 + 0.01239 = 2.31 kg

Total mass in appropriate significant figures be 2.3 kg

(While addition you retain the number of digits after decimal places as they are in the observation with the minimum number of decimal places)

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Illustration: 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 correct option is D 2.3 kg Total mass = 2.3 + 0.00215 + 0.01239 = 2.31 kg Total mass in appropriate significant figures be 2.3 kg (While addition you retain the number of digits after decimal places as they are in the observation with the minimum number of decimal places)

The correct option is D
2.3 kg

Total mass = 2.3 + 0.00215 + 0.01239 = 2.31 kg

Total mass in appropriate significant figures be 2.3 kg

(While addition you retain the number of digits after decimal places as they are in the observation with the minimum number of decimal places)