Question

In a 5500 metres race, athletes run ______ km.

• A. 5
• B. 5.25
• C. 5.75
• D. 5.5

Answer 1

The correct option is D 5.5

$1\text{km}=1000\text{metres}$
$\therefore 1\text{metre}=\frac{1}{1000}\text{km}$

$\therefore 5500\text{metres}=\frac{5500}{1000}\text{km}$
$=\frac{55}{10}\text{km}=5.5\text{km}$