If circumference of first circle is 132 cm and circumference of second circle is 110 cm then find the difference between area of both the circle?

Of the three numbers whose average is 60, the first is one-fourth of the sum of the whole number. The first number is: 

Directions:  Study the bar-graph given below & answer the questions.
Pie-chart given below shows the percentage distribution of total no. of boys in six different Schools.
Total Boys in all schools together = 6400

Total student in another school H is 250% more than the boys in school B and ratio of boys to girls in school H is 1 : 2. Then find number of boys in school H?

The curved surface area of cylindrical pillar is $$ {264 m^{2}}$$ and its volume is $$ {924 m^{3}}$$. Find the ratio of its diameter to its height.

In what time will the annual simple interest rate at $$ {6{1\over4}{\%}}$$ , 72 rupees becomes 81 rupees?

Two numbers are respectively 30% and 40% less than a third number. What percent is the first number of the second?

The price of jewelry , passing through three hands. rises on the whole by 65 %. If the first and the second sellers earned 20 % and 25 % profit respectively, the profit earned by the third seller is 

Two circles intersect at A and B, P is a point on produced BA. PT and PQ are tangents to the circles. The relation of PT and PQ is