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 the total mass of the box and the difference in the masses of the pieces to

Correct answer: B. 2.3 ~kg, 0.02 ~g aligned Total mass = & 2.3 kg+0.02015 kg & +0.02017 kg = & 2.34032 kg=2.3 kg aligned Difference of mass of the gold pieces =20.17 g-20.15 g=0.02 g

AIIMS 201826 May

Exam: AIIMS
Year: 2018
Date: 26 May
Subject: Physics
Chapter: Mathematics in Physics

AIIMS 2018 · 26 May · Physics · Mathematics in Physics

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

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

2.3 \mathrm{~kg}

. Two gold pieces of masses

20.15 \mathrm{~g}

and

20.17 \mathrm{~g}

are added to the box. What is the total mass of the box and the difference in the masses of the pieces to correct significant figures?

Options

A $2.34 \mathrm{~kg}, 0 \mathrm{~g}$
B $2.3 \mathrm{~kg}, 0.02 \mathrm{~g}$
C $2.34 \mathrm{~kg}, 0.02 \mathrm{~g}$
D $2.3 \mathrm{~kg}, 0 \mathrm{~g}$

Correct answer

B. $2.3 \mathrm{~kg}, 0.02 \mathrm{~g}$

Step-by-step solution

\begin{aligned} \text{ Total mass }= & 2.3 \mathrm{ kg}+0.02015 \mathrm{ kg} \\ & +0.02017 \mathrm{ kg} \\ = & 2.34032 \mathrm{ kg}=2.3 \mathrm{ kg}\end{aligned}

Difference of mass of the gold pieces

=20.17 \mathrm{ g}-20.15 \mathrm{ g}=0.02 \mathrm{ g}

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