if the speed of an aeroplane is decreased by 120 km/h, it takes 18 minutes more to travel some distance. If the speed is increased by 180 km/h , it takes 18 minutes less to travel some distance. find the average speed of aeroplane and the distance.
Answers
Answered by
27
Step-by-step explanation:
(x-120)(y+3÷10)=x×y
(x+180)(y-3÷10)=x×y
x=720
y=3÷2
Attachments:
Similar questions