If a side of a square is a, then what will be the area of the square on its diagonal?

A circular park whose diameter is 210 m has a 5 m wide path running around it(on the outside). What is the area ( in m²) of the path?

A train crosses two persons travelling at 3 kmph and 5 kmph in the same direction in 10 seconds and 11 seconds respectively. The speed of the train is:

The HCF and LCM of two numbers are 21 and 4641 respectively. If one of the numbers lies between 200 and 300, then the two numbers are-

A sum of money at simple interest amount to Rs.4800 in 3 years and Rs.5600 in the 5 years. The sum is

Cost of a stone varies directly as the square of its weight. A stone broke into four pieces with their weights in the ratio 1 : 2 : 3: 4. If the loss in the total value of the stone  was Rs.7000, the price of the original stone was

The value exponential form of   $$\sqrt {\sqrt{2}×{\sqrt{3}}}$$

If ABC is an equilateral triangle and P, Q, R respectively denote the middle points of AB, BC, CA, then