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1. In a flight of 600 km, an aircraft was slowed down due to bad weather. Its average speed for the trip was reduced by 200 km/hr and the time of flight increased by 30 minutes. The duration of the flight is:





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  • By: guest on 01 Jun 2017 05.49 pm
    Let the duration of the flight be x hours. Then, 600 - 600 = 200 x x + (1/2) 600 - 1200 = 200 x 2x + 1 x(2x + 1) = 3 2x2 + x - 3 = 0 (2x + 3)(x - 1) = 0 x = 1 hr.      [neglecting the -ve value of x]
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