Question

In a flight of 6000 km an aircraft was slowed down due to bad weather . Its average speed for trip was reduced by 400km/hour and time increased by 30 minutes. Find the origina duration of time.

Answer 1

Step-by-step explanation:

let the original speed of flight be x km/he

we know that

time=distance/speed

6000/x - 6000/x-400= 30

by solving

we get

x^2-400x-4800000

x^2-2400x+2000x-4800000

x(x-2400)+2000(x-2400)

(x+2000)(x-2400)

x cannot be zero

x=2400km/h

distance/original speed = time

6000/2400

5/2hr = time

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