A boat man could row his boat with a speed 10 m/sec. He wants to take his boat from P to a point Q just opposite on the other bank of the river flowing at a speed 4 m/sec. He should row his boat-
A
At right angle to the stream
B
At an angle of sin –1 
with PQ up the stream
with PQ up the stream
C
At an angle of sin –1 
with PQ down the stream
with PQ down the stream
D
At an angle of cos –1 
with PQ down the stream
with PQ down the stream
Text Solution
Verified by ExpertsThe correct answer is:
B
= Velocity of river
10 sin θ = 4 
= Velocity of boat
sin θ = 
= Velocity of boat w.r.t. river.
θ = sin –1 
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
Two trains, each 50 m long are travelling in opposite direction with velocity 10 m/s and 15 m/s . T…
A 120 m long train is moving in a direction with speed 20 m/s . A train B moving with 30 m / s in t…
A 210 meter long train is moving due North at a of 25m/s. A small bird is flying due South a little…
A police jeep is chasing with, velocity of 45 km / h a thief in another jeep moving with velocity 1…
A boat is sent across a river with a velocity of 8 km/hr. If the resultant velocity of boat is 10 k…
A train of 150 meter length is going towards north direction at a speed of . A parrot flies at the…