Two friends, A and B are standing at points P and Q, respectively. If A starts moving towards point Q from point P with the speed of $(\mathrm{x} – 5)$ km/hr. After $2$ hours, B starts moving towards point P from point Q with speed $(\mathrm{x} + 5)$ km/hr, and they meet at the midpoint of P and Q. Find the time taken by A to go from point P to point Q. if the distance between point P and point Q is $480$ km.

Gopal covers $100 \mathrm{km}$. He travels at a speed of $60 \mathrm{kmph}$ for the first $40 \mathrm{km}$ and the rest of the distance at $40 \mathrm{kmph}$. What is his average speed in $kmph$?

1. $44.20$
2. $45.20$
3. $46.20$
4. $47.20$

Ali travels a distance of $300 \mathrm{m}$ in $2$ minutes and $30$ seconds. What is his speed in $\mathrm{kmph}$?

The speeds of John and Max are $30 km/h$ and $40 km/h$. Initially, Max is at a place L and John is at a place M. The distance between L and M is $650 km$. John started his journey $3$ hours earlier than Max to meet each other. If they meet each other at a place P somewhere between L and M, then the distance between P and M is how much?

Train A, travelling at $\mathrm{S} \mathrm{m}/\mathrm{s}$, can cross a platform double its length in $21$ seconds. The same train, travelling at $\mathrm{S}+5 \mathrm{m}/\mathrm{s}$, can cross the same platform in $18$ seconds. What is the value of $\mathrm{S}$?

A man covers a certain distance in 10 minutes with the speed of 15km/hr. If he wants to cover the same distance in 7 minutes, then what should be his speed?

Two trains are running opposite each other. Speeds of both trains are $112 km/hr$ and $115 km/hr$. Find the relative speed of both trains with respect to each other.