On increasing the radius of circle by 1 cm, its area is increased by 44 cm² .The original radius of the circle is -

Each exterior angle of a regular polygon measures 9°. How many sides does the polygon have?

If the circumradius of an equilateral triangle be 10 cm, then the measure of its in-radius is

Is New Moore Island?

Areas of two similar triangles are 36 cm² and 100 cm². If the length of a side of the larger triangle is 20 cm, then the length of the corresponding side of the similar triangle is:

Which of the following biomes does not have a tree?

The side of a trapezium pyramid with a square base is 24 cm. and its height is 5 cm. What will be the area of its oblique surface in cm²?

AC is a chord of circle whose centre is at O. If B is any point on the arc AC and ∠OCA=20⁰ , then the magnitude of ∠ABC is