Answer:
Rowing speed is 12.5 miles/hour
Current speed is 2.5 miles/hour
Explanation:
Speed is distance divides by time, we usually use miles per hour
In this case Patrick can row a canoe 3 mi in 12 mins
The speed is the miles he travel divides the time.
We express time in hour, so 12 min is 0.2 of an hour ( 12/60)
Speed=3 miles/0.2 hours=15 miles/hour with the aid of the current
Against the current, 3 miles in 18 minutes
Speed=3 miles/0.3 hours=10 miles/hour against the current
His rowing speed is the average = (15+10)/2 = 12.5 miles/hour
The current speed is the difference = 15 - 12.5 = 2.5 miles/hour