Question

Add 20 kilometres and 300 metres.

• A. 320 km
• B. 20.3 km
• C. 23 km
• D. 2.03 km

Answer 1

The correct option is B

20.3 km

We need to covert 300 m to km To convert smaller unit(m) to bigger unit (km), we need to divide.

We know that, 1000 m = 1 km

$\therefore$ 300 m = $\frac{300}{1000}$ = 0.300 km.

Hence, 20 km + 0.300 km = 20.300 = 20.3 km