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Grade 11General Physics

a person is standing on road by holding umbrella at right angle to the horizontal surface in order to protect himself from rain falling at a speed of 10m/s and where as the velocity of wind is 0 suddenly wind begins to blow at speed of 20m/s towards 30 degree south of west now by what angle the person has to turn umbrella to protect himself from rain
?

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9 Years agoGrade 11
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