Direction: Given below are two quantities named I and II. Based on the given information, you have to determine the relation between the two quantitie...

Direction: Given below are two quantities named I and II. Based on the given information, you have to determine the relation between the two quantities. You should use the given data and your knowledge of Mathematics to choose among the possible answers.

Quantity I: One day Sandeep on tour travels first $160 \text{ km}$ at $64 \text{ km/hr}$ and the next $160 \text{ km}$ at $80 \text{ km/hr}$. The average speed of the tour is:

Quantity II: Sandeep went from Patna to Giridih with the speed of $60 \text{ km/hr}$ and returned back with the speed of $90 \text{ km/hr}$. Find the average speed.