RRB Group-D Model Paper 17 with answers for online practice

Given:
Bus’s speed from Town R to Town S = 29 kmph
Bus’s speed from Town S to Town R = 26 kmph
Formula Used:
Average Speed = 2 (A × B) / (A + B)
Calculations:
As two equal distance are covered at two different speed
Average Speed = 2 (A × B) / (A + B)
⇒ Average Speed = 2 × 29 × 26 / (29 + 26)
⇒ Average Speed = 1508 / 55
⇒ Average Speed = 27.41 ≈ 27.
The approximate average speed of the bus is 27 kmph.