omework Section 17 Homework kW Score42a0 a 7 are Oof1pt 725

omework: Section 1.7 Homework kW Score:42a0%, a 7 are: Oof1pt 7.25 mprintsdrapouritairws

Solution

Speed of boat relative to water = 37 mph

Let speed of boat w.r.t still water = x

Let speed of current be y

So, upstream = x -y = 37 mph ; x = 37 +y

time = 45 min.

distance = 37*45/60 = 27.75 miles

Downstream speed = x +y = 37 +2y

time = 29 min = 0.483 hr

27.75 = (37 +2y)*0.483

y = 10.23 mph