A river 1.00 mile wide flows with a constant speed of 1.00 mi/h. A woman leaves from a point on the river bank. The woman rows a boat 1.00 mi directly upstream and returns to the starting point. Her speed in still water is 2.00 mi/h. The travel time for the woman is

Question

A river 1.00 mile wide flows with a constant speed of 1.00 mi/h. A woman leaves from a point on the river bank. The woman rows a boat 1.00 mi directly upstream and returns to the starting point. Her speed in still water is 2.00 mi/h. The travel time for the woman is 
A) 2.00 h. B) 1.15 h. C) 1.00 h. D) 1.33 h. E) 0.67 h.

Steve · Accepted Answer

since time = distance/speed, 1/(2-1) + 1/(2+1) = 1/1 + 1/3 = 4/3 Looks like (D) to me

Ms. Sue · Answer

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