Question
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?
Answer: Option A
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Let the duration of the flight be x hours. Then,600/x - 600/(x + 1/2) = 200x(2x + 1) = 3
2x2 + x - 3 = 0 (2x + 3)(x - 1) = 0 x = 1 hr.
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