Question : A boy goes from home to school at a speed of 30 km/hr and returns back at a speed of 70 km/hr. What is his average speed for the journey?

Option 1: 42 km/hr

Option 2: 48 km/hr

Option 3: 38 km/hr

Option 4: 36 km/hr

Question : During a journey of 120 km, Rahi drives the first 60 km at the speed of 60 km/hr, the next 30 km at 60 km/hr and the remaining 30 km at the speed of 30 km/hr. Determine the average speed.

Option 1: 48 km/hr

Option 2: 33.33 km/hr

Option 3: 50 km/hr

Option 4: 40 km/hr

Question : A man covers a certain distance by bike. If he covers 25% of the distance at the speed of 25 km/hr, 50% of the distance at the speed of 50 km/hr and the remaining distance at the speed of 12.5 km/hr, find his average speed over the whole journey.

Option 1: 20 km/hr

Option 2: 30 km/hr

Option 3: 25 km/hr

Option 4: 35 km/hr

Question : If a man goes from place A to B at a speed of 12 km/hr and return at a speed of 18 km/hr, then the average speed for the whole journey is:

Option 1: $6 \mathrm{~km} / \mathrm{hr}$

Option 2: $30 \mathrm{~km} / \mathrm{hr}$

Option 3: $14 \frac{2}{5} \mathrm{~km} / \mathrm{hr}$

Option 4: $15 \mathrm{~km} / \mathrm{hr}$

Question : A man goes from place A to B at a speed of 12 km/hr and returns from B to A at a speed of 18 km/hr. His average speed for the entire journey is:

Option 1: $14 \frac{2}{5} \mathrm{~km} / \mathrm{hr}$

Option 2: 15 km/hr

Option 3: 6 km/hr

Option 4: 30 km/hr