Question 382546
the distance isn't given because it has no bearing on the answer


that means we can choose a convenient "working" distance , like 36 nautical miles


time to H ___ 36/12 = 3


return time ___ 36/18 = 2


total time is 5 hr and total distance is 72 nautical miles


average speed is 72/5 or 14.4 knots/hr