If the boat crosses the river in shortest possible time- nbsp- then its drift will be- 250 m-zero- 125 m- 250-3- m-

104

You visited us 104 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Physics

Relative Motion: Rain Example

If the boat c...

Question

If the boat crosses the river in shortest possible time, then its drift will be:-

zero

No worries! We‘ve got your back. Try BYJU‘S free classes today!

250 m

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

125 m

No worries! We‘ve got your back. Try BYJU‘S free classes today!

\frac{250}{\sqrt{3}} m

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A $250 m$
$v_{b} = 4, v_{r} = 2, d = 500 m$
For shortest possible time $v_{b}$ should be along AB
$t = \frac{d}{v_{b}}$
$t = \frac{500}{4} = 125 s e c$
$d r i f t$ : horizontal displacement of the boat
$d r i f t$ $=$ $v_{r} \times t$
$= 2 \times 125$
$= 250 m$

Suggest Corrections

Similar questions

Q. The shortest possible time required by the boat to cross the river will be:-

Q. A boat crosses a river of width 200m in the shortest time and is found to experience a drift of 100m is reaching the opposite bank. The time taken now is 't'. If the same boat is to cross the river by shortest path, the time taken to cross will be:

A man wishes to cross a river in a Boat if he crosses the river in minimum time it takes 10 minutes with a drift of 120 m. if he crosses the river taking shortest route he takes 12.5 minutes find the velocity of boat .

Q. The speed of a boat in still water is

\sqrt{5} m/s

. While crossing a river, the average speed of the boat is

3 m/s

. If boat crosses the river in the shortest possible time, what is the speed of flow of water?

Q. A man wishes to cross a river in a boat. If he crosses the river in minimum time, then he takes

10

minutes with a drift of

120 m

. If he crosses the river taking shortest path, he takes

12.5

minutes. Velocity of boat w.r.t water is :

Join BYJU'S Learning Program

If the boat crosses the river in shortest possible time, then its drift will be:-

The correct option is A 250 mvb=4,vr=2,d=500mFor shortest possible time vb should be along ABt=dvbt=5004=125secdrift : horizontal displacement of the boatdrift = vr×t =2×125 =250m

The correct option is A $250 m$
$v_{b} = 4, v_{r} = 2, d = 500 m$
For shortest possible time $v_{b}$ should be along AB
$t = \frac{d}{v_{b}}$
$t = \frac{500}{4} = 125 s e c$
$d r i f t$ : horizontal displacement of the boat
$d r i f t$ $=$ $v_{r} \times t$
$= 2 \times 125$
$= 250 m$