If radius of a sphere is decreased by 48%, then by what percent does its surface area decrease?

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

A cube has sides that are 4 cm each, and the dimensions of a cuboid are 2cm x 3cm x 4cm. Find the positive difference between the volume of the cube and that of the cuboid.

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

In △PQR, ∠P = 90°. S and T are the mid points of sides PR and PQ, respectively. What is the value of RQ²/(QS²+ RT²)?

In ΔPQR, PQ=QR and O is an interior point of ΔPQR such that ∠OPR=∠ORP.

Consider the following statements:

(i) ΔPOR is an isosceles triangle.

(ii) O is the centroid of ΔPQR.

(iii) ΔPQO is congruent to ΔRQO.

Which of the above statements are correct?

For an equilateral triangle, the ratio of the in-radius and the outer- radius is

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