Time and Distance - Arithmetic Aptitude Questions and Answers

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Discussion :: Time and Distance

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:

1 hour

2 hours

3 hours

4 hours

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Answer : Option A

Explanation :

Let the duration of the flight be x hours.

Then, $\frac { 600 } { X } -$ $\frac { 600 } { X+(1/2) }=200$

$\frac { 600 } { X } -$ $\frac { 1200 } { 2X+1 }$ =200

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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