Question

An aeroplane flies with an average speed of 756 km/hr. A helicopter takes 48 hours to cover twice the distance covered by aeroplane in 9 hours. How much distance will the helicopter cover in 18 hours

Answer 1

distance covered by aeroplane in 18 hours =speed ×time
=756×18
=13608km
the distance covered by helicopter in 48 hours=twice distance of the aeroplane
=2×13608
=27216km
speed of helicopter
=27216÷48=567kmper hour
distance covered by helicopter in 9 hours
=567×9
=5103km

Answer 2

Answer:

average speed of aeroplane = 756 km/hr

time taken by aeroplane= 9 hours

distance covered by aeroplane= (756×9) km = 6804 km

now the questions says helicopter covers twice the distance of aeroplane in 48 hrs..!!

so very simple

twice means = 6804+6804= 13608 km

now distance to be covered by helicopter in 9 hours..!!

twice distance × to cover distance/ general time taken to cover distance

that means

13608× 18/48 = 5103 km

so final ans is: 5103

Hope this solution helps..!!

cheers