Question

Please answer it fast it's urgent

Answer 1

Let the distance from A to B be x (case1)
The Distance from B to A be x (case2)
Total distance = 2x

(speed from case 1 + speed from case 2)/
2
= 30kmph+40kmph /2
= 70kmph/2
= 35kmph
Average speed = 35 kmph.
Hope it helped you. :-)