Q 1669212115.     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//h` and the time of flight
increased by `30` `min`. The duration of the flight is

CDS 2015 Paper-1
A

`1` `h`

B

`2` `h`

C

`3` `h`

D

`4` `h`

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