Answer:
7 9/10 hours
Step-by-step explanation:
The total climb time will be the time taken for him to walk up and then down the mountain, so we can add the two times together.
[tex]4\frac{3}{4} + 3\frac{3}{20} = 7 \frac{9}{10}[/tex]
Hope this helps, let me know if you have any questions!
