Answer:
[tex]2\frac{19}{24}[/tex] hours
Step-by-step explanation:
Given,
The total numbers of hours allotted = 4,
In first 2 hours,
Practice in first hour = [tex]\frac{5}{8}[/tex] hour,
In second hour = [tex]\frac{2}{3}[/tex] hour,
Remaining hours = 4 - 2 = 2 hours,
In remaining 2 hours,
Practice in first hour = [tex]\frac{3}{5}[/tex] hour
Rest time = [tex]\frac{1}{2}[/tex] hour
Remaining time or practice in second hour = [tex]2-\frac{1}{2}-\frac{3}{5}=\frac{20-5-6}{10}=\frac{9}{10}[/tex]
Total time of practicing = [tex]\frac{5}{8}+\frac{2}{3}+\frac{3}{5}+\frac{9}{10}[/tex]
[tex]=\frac{75+80+72+108}{120}[/tex]
[tex]=\frac{335}{120}[/tex]
[tex]=2\frac{19}{24}[/tex] hours