Question

A boat which has a speed of 6 km/h in still water crossess a river of width 1 km along the shortest path in 15 minutes the velocity of river in km/h
A) 1
B) A^2
C) A2
d) zero​

Answer 1

Answer:

(a) is the answer........

Answer 2

6sinx

6cosx ×1/4= 1km

cosx=2/3

sinx=√5/3

speed of river =6×√5/3=2√5km/hr