An aeroplane takes 1 hr more for thejourney 1200 km if its speed is decreased by 100 km?hr for its usual speed find the usual speed
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Now, speed is increased by 100 km/hr and the time has taken is 1 hour less for the same journey.
⇒ Speed of the plane after increased = (x +100) km/hr and Time is taken by plane with


Since speed cannot be negative so, x = 300 ∴ usual speed of the plane = 300 km/hr
m
Now, speed is increased by 100 km/hr and the time has taken is 1 hour less for the same journey.
⇒ Speed of the plane after increased = (x +100) km/hr and Time is taken by plane with


Since speed cannot be negative so, x = 300 ∴ usual speed of the plane = 300 km/hr
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