Rate Problems

Alicia went on a steamboat ride up the Mississippi River. The boat travels 28 miles per hour in still water. How long will it take her to travel 120 miles upstream if the current of the river is 8 miles per hour?

36 hours
4.3 hours
7 hours
6 hours

Question

Rate Problems



Alicia went on a steamboat ride up the Mississippi River. The boat travels 28 miles per hour in still water. How long will it take her to travel 120 miles upstream if the current of the river is 8 miles per hour?

    36 hours
    4.3 hours
    7 hours
    6 hours

anonymous · Answer

@texaschic101

anonymous · Answer

Relative speed is 28 -8 = 20 mil/hr
120 miles/ 20 miles/hr = 6 hours

anonymous · Answer

Well basically Alicia's speed is 28 miles/ hr, so when she travels up, her relative speed will be lower since she's opposing the water.

anonymous · Answer

Yeah I know, sorry for being lazy :P, I've been answering so many questions I sometimes just assume they'll figure it out. Though I shouldn't do that, sorry man.