Question

Kali runs $10$ laps around a track each day.

Each lap around the track is $400$ meters.

How many days will it take Kali to run a total of $12$ kilometers?

Answer 1

Calculate the number of days taken by the Kali:

It is known that,

$\begin{array}{rcl}1\mathrm{km}& =& 1000\mathrm{m}\\ 12\mathrm{km}& =& 12,000\mathrm{m}\end{array}$

Given that, each lap around the track is $400$ meters:

$\begin{array}{rcl}\therefore 10\mathrm{laps}& =& 400\times 10\\ & =& 4000\mathrm{m}\end{array}$

The number of days taken by the Kali to complete $12$ kilometers is computed as:

$\begin{array}{rcl}\mathrm{Number}\mathrm{of}\mathrm{days}& =& \frac{12000}{4000}\\ & =& 3\mathrm{days}\end{array}$

Hence, the number of days taken by the Kali to complete $12$ kilometers is $3$ days.