Question

in a flight of 2800km, an aircraft was slowed down due to bad weather. it's average speed is reduced by 100km/h and time increased by 30min. find the original duration of the flight

Answer 1

Answer:

Step-by-step explanation:

Let the original average speed of flight be x km/hr.

Speed = distance/time Therefore time = distance/speed.

Distance = 2800km

T1 = 2800/x

T2 = 2800/x-100             (because speed is reduced by 100)

And, we know T2 - T1 = 30 min = 1/2hr

Therefore,

2800/x-100 - 2800/x = 1/2

2800(1/x-100 - 1/x) = 1/2

100*2800/x^2-100x = 1/2