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In a flight of 600kmba aircraft …

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In a flight of 600kmba aircraft was slow down due to bad weather its avarage speed for the trip was reduce by 200km/hr and the time of flight increased by 30 minute find the time duration of flight

    • Posted by Anshika Namdeo 4 years, 10 months ago

    CBSE > Class 10 > Mathematics
    • 2 answers

    Sanket Arjun 4 years, 10 months ago

    Case 1. D=600 km,speed=x,T=600/x Case 2.D=600 km,speed=x-200,T=600/x-200 So, 600/x-200 - 600/x =30min 600(1/x-200- 1/x)=1/2 hr 600(x-x+200/x^2-200x)=1/2 X^2-200x-240000=0 X^२-600x+400x+240000 X(x-600)+400(x-600)=0 X=600 or x=-400 (rejected) So, T=600/600=1

    0Thank You

    Sanket Arjun 4 years, 10 months ago

    1 hour

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