Question : One-third part of a certain journey is covered at the speed of 10 km/hr, one-fourth part at the speed of 15 km/hr, and the rest part at the speed of 20 km/hr. What will be the average speed (in km/hr) for the whole journey?

Option 1: $15$

Option 2: $\frac{200}{17}$

Option 3: $\frac{240}{17}$

Option 4: $\frac{280}{17}$

Question : Mohan completed a certain journey by car. If he covered 30% of the distance at 90 km/hr, 45% of the distance at 135 km/hr, and the remaining distance at 75 km/hr. His average speed (in km/hr) for the entire journey is:

Option 1: 100

Option 2: 90

Option 3: 105

Option 4: 95

Question : A truck covers three equal distances of 100 km at the speeds of 200 km/hr, 300 km/hr, and 600 km/hr. Find the average speed of the truck for the whole journey.

Option 1: 250 km/h

Option 2: 300 km/h

Option 3: 366.66 km/h

Option 4: 327 km/h

Question : The speed of a car going from A to B is 110 km/hr while coming back, its speed is 76 km/hr. What is the average speed during the entire journey?

Option 1: $87\frac{81}{99}\mathrm{km}/\mathrm{hr}$

Option 2: $83\frac{89}{93}\mathrm{km}/\mathrm{hr}$

Option 3: $89\frac{83}{93}\mathrm{km}/\mathrm{hr}$

Option 4: $82\frac{91}{97}\mathrm{km}/\mathrm{hr}$

Question : A train travelling from Mumbai to Goa covered the first 420 km at a speed of 60 km\hr and then covered the remaining 95 km at a speed of 65 km/hr. Find its average speed in km/hr.

Option 1: 63.5

Option 2: 60.86

Option 3: 62

Option 4: 62.3

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