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[Post New]15 Jun 2008 13:02:52 IST
    Subject: one who solves this problem correctly is genius for me
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shikhar.jain50 (47)

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Olaaa!! Perrrfect answer. 7  [13 rates]
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an aeroplane pilot sets a compass needle course due west and maintains air speed of 120km/h after flying half an hour the plane is over town which is 75km west and 20km south of his starting point . the velocity of wind will be=>_____km/h  ;___degree____of_____
    
[Post New]15 Jun 2008 15:59:07 IST
    Subject: one who solves this problem correctly is genius for me
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krishna.gopal (2399)

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Olaaa!! Perrrfect answer. 381  bad job dude!! I dont approve of this answer! 2  [632 rates]
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Diplacment because of motion of plane in half hr = 60km due west.
So displacement due to wind =(75-60)=15 km due west and 20 km due north
So wind velocity is sqrt(15^2+20^2)/0.5 hr = 50 km/hr making an angle of 37 degree from north due west (tan 37 = 3/4)
Krishna Gopal Singh
B.Tech Chemical Engg
IIT Delhi 2002
Currently doing PhD from IIT Delhi
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