science

Grade-11

Easy

Question

If the river's width is 10 m and the angle of the drift is 60 degrees, the velocity of the person on the boat concerning the river is 4 m/s. Find the time taken by to cross the river.

2.3
3.1
2.9
5.2

hint Hint:

2.9 s

The correct answer is: 2.9

Given:
The velocity of the person on a boat (Vp) = 4ms^-1Angle of drift (θ) = 60^οWidth of the river (d) = 10m
To find:
Time taken (t) = ?
Solution:
$S i n theta space equals space P over H space S i n 60 space equals space fraction numerator 10 space over denominator H end fraction H space equals space fraction numerator 10 over denominator begin display style fraction numerator square root of 3 over denominator 2 end fraction end style end fraction space equals space 11.7 m space left parenthesis space d i s tan c e space c o v e r e d space b y space t h e space p e r s o n right parenthesis space B y space u sin g comma s p e e d space equals fraction numerator space D i tan c e space over denominator t i m e end fraction T i m e space t a k e n space equals space fraction numerator 11.7 over denominator 4 end fraction space equals space 2.9 s$

Answer:
Time taken to cross the river = 2.9s

If the river's width is 4 m and the angle of the drift is 30 degrees, the velocity of the person on the boat concerning the river is 3 m/s. Find the time taken to cross the river.

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If the river's width is 10 m and the angle of the drift is 60 degrees, the velocity of the person on the boat concerning the river is 4 m/s. Find the time taken by to cross the river.

2.33.12.95.2

2.9 s

The correct answer is: 2.9

Given:The velocity of the person on a boat (Vp) = 4ms-1Angle of drift (θ) = 60οWidth of the river (d) = 10mTo find:Time taken (t) = ?Solution:Answer:Time taken to cross the river = 2.9s

Related Questions to study

If the river's width is 4 m and the angle of the drift is 30 degrees, the velocity of the person on the boat concerning the river is 3 m/s. Find the time taken to cross the river.

If the river's width is 4 m and the angle of the drift is 30 degrees, the velocity of the person on the boat concerning the river is 3 m/s. Find the time taken to cross the river.

Let us consider two cars, A and B, are moving with constant acceleration 4 m/s2 and constant velocity 6 m/s with t = 0 s, both cars are 20 m apart, car A is behind car B, find the time when car A overtakes car B.

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2.3
3.1
2.9
5.2

Let us consider two cars, A and B, are moving with constant acceleration 4 m/s² and constant velocity 6 m/s with t = 0 s, both cars are 20 m apart, car A is behind car B, find the time when car A overtakes car B.

Let us consider two cars, A and B, are moving with constant acceleration 4 m/s² and constant velocity 6 m/s with t = 0 s, both cars are 20 m apart, car A is behind car B, find the time when car A overtakes car B.

Let us consider two cars, A and B, are moving with a constant acceleration of 2 m/ s² and a constant velocity of 3 m/s with t=0 s. Bo the cars are 12 m apart, car A is behind car B. Find the time when car A overtakes car B.

Let us consider two cars, A and B, are moving with a constant acceleration of 2 m/ s² and a constant velocity of 3 m/s with t=0 s. Bo the cars are 12 m apart, car A is behind car B. Find the time when car A overtakes car B.