For the following questions answer them individually
What should come in place of the question mark (?) in the following mathematical statement?
$$\sqrt{19\times650\div13+18.5\times4}\times13 =?$$
A person goes from P to Q at a speed of 20 km/h. Then he goes from Q to R at a speed of q km/h. Finally the person goes from R to S at a speed of r km/h. The distances from P to Q, Q to R and R to S are equal. If the average speed from P to R is $$\frac{280}{11}$$ km/h, and the average speed from Q to S is $$\frac{112}{3}$$ km/h, then what is the value of r?
The amount received after 8 years on a certain sum of money invested at the rate of 18% simple interest per annum is ₹1,220. What was the initial sum invested?
Piu and Titu start from the same place at the same time and walk in opposite directions. If Piu walks at 5 km/h and Titu walks at 2 km/h, after what time will they be 10.5 km apart?
Which part of the Constitution of India talks about the Directive Principles of State Policy?
The Purple Revolution, which was launched in Jammu and Kashmir, is also known as ______.
