Solve the Problem. -A Boat Heads Upstream a Distance of 30 Miles on 30

Multiple Choice

Solve the problem.
-A boat heads upstream a distance of 30 miles on the Mississippi river, whose current is running at 5 milesper hour. If the trip back takes an hour less, what was the speed of the boat in still water? Give the answerrounded to two decimal places, if necessary.

A) 18.03 mph
B) 16.58 mph
C) 6 mph
D) 15 mph