Answer:
7:45
Explanation:
Start?
throughout-20min
ended-8:05
we have to subtract 20minutes from 8:05 to see where she started
8:05⇒8:00 would be minus five minutes
so 15 minutes
8:00⇒7:50 would be minus ten minutes
so 5 minutes
7:50⇒7:45
so 7:45 is the time she started jump roping