Due to inclement weather an air plane reduced its speed by 300 Km hr and reached the destinati...........

Quantitative Aptitude (CGL) Time & distance

Due to inclement weather, an air plane reduced its speed by 300 Km/ hr, and reached the destination of 1200 km late by 2hrs. Then the schedule duration of the flight was.

1 hour

1.5 hour

2 hour

2.5 hour

1 hour

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Explanation:

Let the original speed of Aeroplane be x km/hr
1200/((x-300) )-1200/x=2
(x-x+300)/(x-300)x=2/1200
x(x-300)=600 × 300
x=600 km/hr
original timet=1200/600=2 hours