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Ans this question,its urgent...give proper explanation,,by solving it A to Z

Ans this question,its urgent...give proper explanation,,by solving it A to Z

Question Image
Grade:11

1 Answers

Umakant biswal
5359 Points
4 years ago
@ navya 
this is a typical simple ques from rain and umbrella problem with respect to man . 
i am solving that below 
rain has x comp v cos 30 and y comp v sin 30. 
when he runs at 4 km/hr, rain is vertical => v cos theta = 4
v cos  30 =4
or u can say v = 4/cos 30 
v sin 30 =(4/cos 30 ) * sin 30 = 4 tan 30 = 4/root(3)
so, OPTION NO 2 WILL TURNS OUT TO BE THE CORRECT OPTION . 
HOPE U UNDERSTOOD IT 
ALL THE BEST ..


 

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