Question

Distance between X and Y is 70 Kms a persons covers X to Y with 40 Kmph and from Y to X with 10 Kmph find his average speed on total journey ?​

Answer 1

Answer:

50km/hr

Step-by-step explanation:

average speed = total distance travelled ÷ total time taken

total distance =70km

total time = distance between x and y ÷ total speed

=70÷40+10

=70÷50

=7/5

=1.4 hrs

average speed = 70÷1.4

50km/hr

Answer 2

Step-by-step explanation:

d=70 km

speed of person by which reaches from x to y=40kmph

therefore, time taken to reach =70/40=7/4hr

similarly while returning the speed is= 10kmph

therefore,time taken return is=70/10=7hr

therefore total time taken is=7/4+7=35/4

therefore, Total distance = 140 km

therefore ,average distance = total distance/ total time taken=140/35/4

=140×4/35=16kmph