Two men set out at the same time to walk towardo each other from points A and B; 72 km apart. The first man walks at the speed of 4 kmph while the second walks 2 km in the first hour, 2 km in the second hour, 3 km in the third hour, and so on. The two men will meet

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. $47.20$

A vehicle with mileage $15 \mathrm{km}/\mathrm{L}$ contains $2 \mathrm{L}$ of fuel. The vehicle gets some defect as a result of which $5 \mathrm{L}$ of fuel gets wasted per hour, when the engine is on. With what minimum speed, the vehicle has to move to travel $20 \mathrm{km}$ with the existing amount of fuel, if it travels with a uniform speed?

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

Consider an equilateral triangle ABC as given in the following diagram:

Two people start at the same time from points A and B with speeds $30 \mathrm{km}$ per hour and $20 \mathrm{km}$ per hour respectively, and move on the sides of the triangle in the clockwise direction. They meet each other for the first time at