Question

Solve the expression:
88 kg 500 g + 12 kg 42 g

• A. 100 kg
• B. 100.5 kg
• C. 100.542 kg
• D. 100.53kg

Answer 1

The correct option is C 100.542 kg

Convert all the units to kilogram.
Converting 500 g (in 88 kg 500 g) into kg:
We know,
$\text{1 kg = 1000 g}$
$\therefore 500g=\frac{500}{1000}=0.5kg$
$\Rightarrow 88\text{kg}500\text{g}=88\text{kg}+0.5\text{kg}=88.5\text{kg}$

Similarly, converting 42 g (in 2 kg 42 g) into kg:
$\therefore 42g=\frac{42}{1000}=0.042$
$\Rightarrow 12\text{kg}42\text{g}=12\text{kg}+0.042\text{kg}=12.042\text{kg}$

Now add both the terms:
$\text{88kg 500g + 12 kg 42g = 88.5 kg + 12.042 kg}$
$\text{= 100.542 kg}$