For the following questions answer them individually
A person covers a distance of 7.5 km a speed of 25 m/sec. What is the time taken by the person to cover the mentioned distance?
The following pie chart shows the sectors representing the shares of the number of bottles sold by each of seven different shops in terms of the central angles (in degrees) with respect to the total number of bottles sold by all the seven shops taken together.
If the total number of bottles sold by all the 7 shops taken together is 1500, then what is the number of bottles sold by S4?
$$\frac{2}{5}$$ of the marked price of an item is equal to $$\frac{4}{7}$$ of its cost price. If a discount of 15% is given on its sale, then what is the approximate profit percentage earned?
A train crosses a stationary pole completely in 18 seconds and a bridge completely in 44 seconds. If the length of bridge is 650 metres, then what is the length of the train?
Loudness of sound is proportional to the ______ of the amplitude of the vibration producing the sound.