The diameter of a circle is 112 cm. What is the circumference of this circle? [use $$π={22\over 7}$$]

The length of the diagonal and the breadth of a rectangle is 13 cm and 5 cm respectively. Calculate its area (in cm²).

The length and the breadth of a rectangle are made to increase and decrease, respectively, by 8% and 10%. What is the percentage increase or decrease in its area?

The perimeter of a right-angled triangle is 60 cm, and its hypotenuse is 26 cm. Find its area? 

The sides of a triangle are in the ratio 2 : 3 : 4. The perimeter of the triangle is 18 cm. The area (in cm²) of the triangle is

Two circles of radii 4 cm and 9 cm respectively touch each other externally at a point and a common tangent touch them at the points P and Q respectively. Then the area of square with one side PQ, is:

The difference between the length and breadth of a rectangle is 23 m. If its perimeter is 206 m, then its area is

A sphere of radius 5 cm is melted to form a cone with base of same radius. The height (in cm) of the cone is