Solution
It take 3/4 of a minute -------> 1 lap
[tex]\begin{gathered} 1hr=60min \\ x=1min \\ x=\frac{1}{60}hr \end{gathered}[/tex]
3/4 of a minute = 3/4 x 60 = 45secons
Therefore
1 lap = 45 seconds
1/2 hour = 30 min
30 min = 30 x 60 seconds
= 1800 seconds
since
[tex]\begin{gathered} 1\text{ lap = 45 second} \\ x=1800\text{ second} \\ x=\text{ 1800/45} \\ x=40lap \end{gathered}[/tex]
Hence the answer = 40 laps
