A bird is sitting on a train $A$ moving at a speed of $40 \mathrm{kmph}$. It sees another train $B$ at a Distance of $200 \mathrm{m}$ with Speed of $60 \mathrm{kmph}$ coming from the opposite direction on the same rail track. It flies with an average speed of $10 \mathrm{kmph}$ and sits on another train. Again immediately it flies back to the first train and again to the second train and so on. It does so before the two trains crash. What is the total distance travelled by the bird?

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

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. $47.20$

The distance between two stations, $\mathrm{A}$ and $\mathrm{B}$,is $575 \mathrm{km}$. A train starts from station $\text{'}\mathrm{A}\text{'}$at $3:00 \mathrm{p}.\mathrm{m}.$and moves towards station $\text{'}\mathrm{B}\text{'}$ at an average speed of $50 \mathrm{km}/\mathrm{hr}$.Another train starts from station $\text{'}\mathrm{B}\text{'}$at $3:30 \mathrm{p}.\mathrm{m}.$and moves towards station $\text{'}\mathrm{A}\text{'}$ at an average speed of $60 \mathrm{km}/\mathrm{hr}$.How far from station $\text{'}\mathrm{A}\text{'}$ will the trains meet?

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.