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The mass of a box measured by a grocer's...

The mass of a box measured by a grocer's balance is 2.300kg. 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 masses of the pieces to correct significant figures?

A

`2.3 kg`

B

`2.34 kg`

C

`2.340 kg`

D

`2.3403 kg`

Text Solution

Verified by Experts

The correct Answer is:
a
Here, mass of the box ,`m = 2.3 kg`
Mass of one gold piece, `m_(1) = 20.15g = 0.02015 kg`
Mass of other gold piece, `m_(2) = 20.17g = 0.02017 kg`
`:.` Total mass `= m+ m_(1) + m_(2)`
`= 2.3kg + 0.02015 kg + 0.02017 kg`
`= 2.34032 kg`
As the result is correct only up to one place of decided therefore on rounding off we get
Total mass `= 2.3 kg`
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