Question

The flight was to leave at 1600 hours. It was delayed by 3 hour 20
minutes. At what time did it leave?​

Answer 1

Answer:

1920 hours it will leave

Answer 2

Answer:

Let the original speed be = x km / hr

we know that : time =speeddistance

As all the things are in hours (unit) we need to correct time in hours unit.

6040=32 hours

According to the question, x1600−x+4001600=32

(x)(x+400)1600x.640000−1600x×32

1920000=2x2+800x

2x2+800x−1920000=0

2(x2+400x−960000)=0

x2+400x−960000=0/2

x2+400x−960000=0

x2+1200x−800x−960000=0

x(x+1200)−800(x+1200)=0

(x−800)(x+1200)=0

x=80