A tugboat is travelling from Asaba to Onitsha across the River Niger with a resultant velocity of 20 knots. If the river flows at 12 knots, the direction of motion of the boat relative to the direction of water flow is
-
A.
36.87oC -
B.
53.13oC -
C.
90oC -
D.
136oC -
E.
143.13oC
Correct Answer: Option B
Explanation
(theta) = cos-1(frac{(12)}{20})
(theta) = 53.13oC