Question

A bike travels 30km at a uniform speed of 40kn/h and next 30km uniform speed of 30km/h find its average speed

Answer 1

Answer:

Average speed = 34.28 m/s

Explanation:

Dist 1 =  30 km

Speed 1 = 40kn/h

Time 1 = Dist / Speed = 30 / 40 = 0.75 hr

Dist 2 = 30 km

Speed 2 = 30km/h

Time 2 = Dist / Speed = 30 / 30 = 1 hr

Average speed = Total Dist / Total Time

Average speed = (30 + 30) / (0.75 + 1)

Average speed = 60 / 1.75 = 34.28 m/s