A motorist covered the first 20 km of his journey in 30 minutes and th

1.	A motorist covered the first 20 km of his journey in 30 minutes and the remaininkm in 40 minutes. Find his average speed in km/hr.g 29 A
Answer» Average speed = (v1 + v2) /2 For distance d = 20 km, time = 30 min = 30/60 = 1/2 hrSpeed v1 = 20/1/2 = 40 km/hr For distance d = 29 km, time = 40 min = 40/60 = 2/3 hrSpeed v1 = 29/2/3 = 43.5km/hr Then,Average speed = (40 + 43.5)/2= 83.5/2= 41.75 km/hr

A motorist covered the first 20 km of his journey in 30 minutes and the remaininkm in 40 minutes. Find his average speed in km/hr.g 29 A

Answer»

Average speed = (v1 + v2) /2

For distance d = 20 km, time = 30 min = 30/60 = 1/2 hrSpeed v1 = 20/1/2 = 40 km/hr

For distance d = 29 km, time = 40 min = 40/60 = 2/3 hrSpeed v1 = 29/2/3 = 43.5km/hr

Then,Average speed = (40 + 43.5)/2= 83.5/2= 41.75 km/hr