Question

an aeroplane flies from A to B 1080 km apart at a speed of 720 km per hour another aeroplane flies the same distance in 15 minutes less time at what speed does the plane fly

Answer 1

first let time = d/s
1080/720=1.5 hrs
and then s=d/t
d= 1080km
t=15mins less so1.25 hrs
s= 1080/1.25
=884 km/hr