Question

A flight of 2400 km is slowed down by 200 km/hrs due to bad weather. Hence the plane takes 1 hrs more than actual time of journey. Calculate usual speed of the plane​

Answer 1

Answer:

1200km/h

I think so

Please make my answer the brainliest answer.

Answer 2

Answer:

Let the original speed =x km/hr

∴ Normal time of flight =

x

2800

hours ,New speed =(x−100)km/hr

∴ Time of flight, when speed is reduced =

x−100

2800

hours

According to the given condition,

(x−100)

2800

−

x

2800

=

60

30

2

1

=

x(x−100)

2800x−2800(x−100)

⇒x

2

−100x−560000=0

⇒x

2

−800x+700x−560000=0

⇒x(x−800)+700(x−800)=0

⇒(x−800)(x+700)=0

⇒x−800=0

x+700=0

⇒x=800,−700

Neglecting the -ve value.

Original speed of the are craft = 800 km/hr

Original duration of flight =

800

2800

=3

2

1

hours