Respuesta :
Answer:
Upstream - 2 miles per hour
Downstream - 3 miles per hour
Step-by-step explanation:
For the speed upstream, the answer would be 2 miles per hour (mph), because 6÷3=2.
For the speed downstream, the answer would be 3 miles per hour (mph), because 6÷2=3.
Both answers come in similar methods. Hope this helps you!
If you don't mind, please mark my answer brainliest!
Answer: her rate in still water is
Step-by-step explanation:
Let x represent the speed of the boat
Let y represent the speed of the current.
Assuming that while she rowed upstream, she rowed in the opposite direction of the current hence, she took longer time. It means her total speed will be x - y
Speed = distance / time
Since she rowed 6 miles upstream in 3 hours, her speed will be 6/3 = 2. Therefore
x - y = 2 - - - - - - - 1
Assuming that while she rowed down, she rowed in the same direction as the current hence, she rowed in still water. It means her total speed will be x + y
Speed = distance / time
Since she rowed 6 miles upstream in 3 hours, her speed will be 6/2 = 3. Therefore
x + y = 3 - - - - - - - 2
Adding equation 1 and equation 2, it becomes
2x = 5
x = 5/2 = 2.5
y = 3 - x = 3 - 2.5
y = 0.5
her rate in still water is x + y = 2.5 + 0.5 = 3 miles per hour
rate of the current is x - y = 2.5 - 0.5 = 2 miles per hour
