KinematicsHard
Question
A boat which has speed of 5 km/h in still water across a river of width 1 km along the shortest possible path in 15 min. The velocity of the river water in km/h
Options
A.1
B.3
C.4
D.√41
Solution
Shortest possible path comes when absolute velocity of boatman comes perpendicular to the river current as shown in figure
t =
= 
∴
Solving this equation, we get vr = 3 km/h
∴ Correct answer is (b)
Create a free account to view solution
View Solution FreeMore Kinematics Questions
A particle has an initial velocity of (3î + 4ĵ) m/s and a constant acceleration of (4î - 3ĵ) m/s2. I...A car, starting from rest, has constant acceleration α1 for time t1 during which it covers a distance s1.In the nex...If the radii circular path of two particles are in the ratio of 1 : 2, then in order same cwntripltal acceleration their...A boat which has a speed of 5km per hour in still water a river of width 1 km along the shortest possible path in fiftee...A particle of mass m moves along a curve y = x2. When particle has x-co-ordinate as 1/2 and x - component of velocity as...