Question

3. A boat, propalled so as to travel with a speed of 050 m/s in still water,
moves directly across a river that is 60m wide The river flows with speed
of 30 m/(o) At what angle relative to the straight-across direction
must the boat be pointed? (b) How long does it take the boat to
Cross the river?​

Answer 1

Step-by-step explanation:

tanA = 0.3/0.5 = 0.6

A = 31o

D = 60/cos31 = 70 m.

V = 70/cos31 = 0.583 m/s

D = V*t = 70 m.

0.583*t = 70

t = 120.1 s.

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