Explanation:
The speed is:
[tex]\frac{1}{2}\colon\frac{1}{4}=2\text{ laps per minute}[/tex]If she swims 2 laps in one minute, then the time it takes her to swim 10 laps is:
[tex]\frac{10}{2}=5\text{ min}[/tex]Answer:
It took her 5 minutes to swim 10 laps
