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13 Jul 2020
A man needs to travel from point A to point B , where point B is 
away, vertically opposite through the river, while the horizontal distance of point A to B is 
. The man needs to reach point B in minimum time. His speed on the ground is 
and in the water his speed is 
. Find out the horizontal distance from A from where the man needs to enter the water in order to reach the point B in minimum time.
A man needs to travel from point A to point B , where point B is away, vertically opposite through the river, while the horizontal distance of point A to B is . The man needs to reach point B in minimum time. His speed on the ground is and in the water his speed is . Find out the horizontal distance from A from where the man needs to enter the water in order to reach the point B in minimum time.
Zhen ZhuLv5
13 Jul 2020
away, vertically opposite through the river, while the horizontal distance of point A to B is 
. The man needs to reach point B in minimum time. His speed on the ground is 
and in the water his speed is 
. Find out the horizontal distance from A from where the man needs to enter the water in order to reach point B in minimum time.
away, vertically opposite through the river, while the horizontal distance of point A to B is 
. The man needs to reach point B in minimum time. His speed on the ground is 
. Find the minimum time the man needs to reach point B.
away, vertically opposite through the river, while the horizontal distance of point A to B is 
. The man needs to reach point B in minimum time. His speed on the ground is 
and in the water his speed is