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The angle of elevation of a …

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The angle of elevation of a jet fighter plane from a point lying on the ground is 60 degree after a fighting is 15 seconds the angle of rotation changed to 30° if the jet is flying at a speed of 720 km per hour find the cost and height of which IIT is flying

    • Posted by Tohid Raza 6 years, 10 months ago

    CBSE > Class 10 > Mathematics
    • 2 answers

    Avinash Saigal 6 years, 10 months ago

    let A be the observation point. and let B and C be the two positions of jet fighter. it takes 15 sec. to reach the point C from B. let the height of the jet fighter from the ground be BE = CD = h km the speed of the jet = 720 km/hr =720000m/hr distance = speed*time therefore BC = in the right angled triangle BEA, in the right angled triangle CDA, AD = AE+ED = AE+BC thus the height of the jet fighter is 2.598 km . Thank you???

    1Thank You

    Chirag Mantri 6 years, 10 months ago

    1500m i guess so

    1Thank You

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    Posted by Kanika . 1 month, 1 week ago

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