Question

An aeroplane takes 3 hours to cover a distance of 3600 km.Another aeroplane travels at a speed which is 100 km/hr less than the 1st aeroplane.How long will the 2nd aeroplane take to cover the same distance?

Answer 1

Assuming that the plane travels at a constant speed. We can say that speed of plane A is 1200km/hr and the speed of plane B is 1100km/hr.
Plane B will take 3600/1100 hr to cover the same distance.

Answer 2

I will tell you the ans in 3 hr 16 min

3600/3=1200km/hr

1200-100=1100km/hr

T=3600/1100=3.27hr*60min=196.20 will come but we don't have to learn in point see we will only use 196 min ok = we will write in standard form =3hr 16 min.. very easy