TanA = (1km/h)/15km/h = 0.066666
A = 3.8o E. of N.
d = 1.17/cos3.8 = 1.173km. = Distance
boat must travel.
Vb = 15/cos3.8 = 15.033 km/h
d = V*t = 1.173 km
15.033t = 1.173
t = 0.078028 h = 4.68 Min.
A hunter wishes to cross a river that is 1.17 km
wide and flows with a speed of 1 km/h parallel to its banks. The hunter uses a small
powerboat that moves at a maximum speed
of 15 km/h with respect to the water.
What is the minimum time necessary for
crossing?
Answer in units of min
Thank you!
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