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Standard XII

Physics

Significant Figures in Sum

The mass of a...

Question

The mass of a box is $2.3 kg$ . Two marbles of mass equal to $2.15 kg$ and $2.48 kg$ are kept in it. The total mass of the box with correct significant figures is

6.93 kg

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6.8 kg

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7 kg

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6.9 kg

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Solution

The correct option is D $6.9 kg$
The arithmetic sum of the mass is
$= 2.3 + 2.15 + 2.48 = 6.93 kg$
On rounding off to correct decimal place, we get, $6.9 kg$ .

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The mass of a box is 2.3 kg. Two marbles of mass equal to 2.15 kg and 2.48 kg are kept in it. The total mass of the box with correct significant figures is

The correct option is D 6.9 kg The arithmetic sum of the mass is =2.3+2.15+2.48=6.93 kg On rounding off to correct decimal place, we get, 6.9 kg.

The mass of a box is $2.3 kg$ . Two marbles of mass equal to $2.15 kg$ and $2.48 kg$ are kept in it. The total mass of the box with correct significant figures is

The correct option is D $6.9 kg$
The arithmetic sum of the mass is
$= 2.3 + 2.15 + 2.48 = 6.93 kg$
On rounding off to correct decimal place, we get, $6.9 kg$ .