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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:


Options:
A .  1 hour
B .  2 hours
C .  3 hours
D .  4 hours
Answer: Option A

Let the duration of the flight be x hours.

Then, 600 - 600 = 200 x x + (1/2)

In A Flight Of 600 Km, An Aircraft Was Slowed Down Due To B... 600 - 1200 = 200 x 2x + 1

In A Flight Of 600 Km, An Aircraft Was Slowed Down Due To B... x(2x + 1) = 3

In A Flight Of 600 Km, An Aircraft Was Slowed Down Due To B... 2x2 + x - 3 = 0

In A Flight Of 600 Km, An Aircraft Was Slowed Down Due To B... (2x + 3)(x - 1) = 0

In A Flight Of 600 Km, An Aircraft Was Slowed Down Due To B... x = 1 hr.      [neglecting the -ve value of x]


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