Question

plz solve this correctly​

Answer 1

Answer:

let the distance between A and B be x

starting journey::::::::

Speed 1 = 50kmph

therefore time taken = x/50

return journey:::::::

speed ²=40kmph

time taken = x/40

then::::::::

total distance travelled =x+x=2x km

displacement =0(ends at starting point)

average speed = total distance/total time

= 2x/(x/50+x/40)

= 2x÷[ x(40+50)/200]

= 2*200/90

= 45 kmph