A plane takes 2 hours and 45 minutes to cover the distance between two

1.	A plane takes 2 hours and 45 minutes to cover the distance between two airports. If ittravels 20 km/h slower then it takes 3 hours. Find the speed of the plane. Also, find thedistance between the two airports.
Answer» let the original speed be x time TAKEN =2HR 45 min =165/60 hr distance =st=165x /60 km if the speed is 20 km per HOUR less new speed =x-20 time taken =3 hours distance =3(x-20) ATQ, 3 (x-20) = 165×160 x=240 km/hr distance = 660 km

A plane takes 2 hours and 45 minutes to cover the distance between two airports. If ittravels 20 km/h slower then it takes 3 hours. Find the speed of the plane. Also, find thedistance between the two airports.

Answer»

let the original speed be x

time TAKEN =2HR 45 min =165/60 hr

distance =s*t=165x /60 km

if the speed is 20 km per HOUR less

new speed =x-20

time taken =3 hours

distance =3*(x-20)

ATQ,

3 (x-20) = 165×160

x=240 km/hr

distance = 660 km