Answer:
30 minutes.
Step-by-step explanation:
If it takes you an hour to run 30 miles but you only need to run 15 miles then you split that hour in half, which results in half an hour or 30 minutes.
30 mins
speee=distance/time
300m/h=15m/time
time=15miles/300miles/hous=1/2 hours=30 mins
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