Question : If Abhi travels a certain distance at 6 km/hr, he reaches his destination 12 minutes early, but if he travels at 4 km/hr, he reaches his destination 10 minutes late. The speed (in km/hr) at which he should travel to reach his destination on time is _____.

Option 1: $5 \frac{1}{4}$

Option 2: $5 \frac{1}{8}$

Option 3: $4 \frac{3}{7}$

Option 4: $4 \frac{5}{7}$

Question : A man has to be at a certain place at a certain time. He finds that he shall be 20 minutes late if he walks at 3 km/hr speed and 10 minutes earlier if he walks at a speed of 4 km/hr. The distance he has to walk is:

Option 1: 24 km

Option 2: 12.5 km

Option 3: 10 km

Option 4: 6 km

Question : A student goes to school at the rate of $\frac{5}{2}$ km/hr and reaches 6 minutes late. If he travels at the speed of 3 km/hr, he reaches 10 minutes earlier. The distance from the school is:

Option 1: 45 km

Option 2: 20 km

Option 3: 10 km

Option 4: 4 km

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 : 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