Question : A man goes to a place on a bicycle at a speed of 16 km/h and comes back at a lower speed. If the average speed is 6.4 km/h in total journey, then the return speed (in km/h) is:

Option 1: 10

Option 2: 8

Option 3: 6

Option 4: 4

Question : A motorist travels to a place 150 km away at an average speed of 50 km/h and returns at 30 km/h. His average speed for the whole journey in km/h is

Option 1: 37.5

Option 2: 37

Option 3: 35

Option 4: 40

Question : Sriya with her family travelled from Bolpur to Suri by car at a speed of 40 km/h and returned to Bolpur at a speed of 50 km/h. The average speed for the whole journey is:

Option 1: $44\frac{4}{9}$ km/h

Option 2: $45$ km/h

Option 3: $45\frac{1}{2}$ km/h

Option 4: $44.78$ km/h

Question : Anil completed a certain journey by car. If he covered 35% of the distance at 70 km/h, 40% of the distance at 80 km/h and the remaining distance at 50 km/h, his average speed (in km/h) for the entire journey is:

Option 1: $66\frac{1}{6}$km/h

Option 2: $66\frac{2}{3}$km/h

Option 3: $66\frac{1}{3}$km/h

Option 4: $66\frac{4}{3}$km/h

Question : A car covers the first 210 km at a speed of 70 km/h, it covers the next 170 km at a speed of 85 km/h. What is its average speed?

Option 1: 72 km/h

Option 2: 76 km/h

Option 3: 74 km/h

Option 4: 68 km/h

Question : Rajinder drives his car at an average speed of 40 km/hr to cover half of his total distance and thereafter he increases his speed to 60 km/hr. He covers his journey in 7 hours. What is the average speed of Rajinder on this journey?

Option 1: 52 km/hr

Option 2: 48 km/hr

Option 3: 50 km/hr

Option 4: 54 km/hr