【英语】流水行船问题If boat A sails from Port A to Port B which is 300
【英语】流水行船问题
If boat A sails from Port A to Port B which is 300 km away,and the speed of water is 2.5km/h,what will be the difference in time between sailing with current and adverse current if the plane's speed with no wind is 17.5 km/h?