Let ΔABC ∼ Δ PQR and ar(∆ABC)/ar(∆PQR) =4/25. If AB = 12 cm, BC = 8 cm and AC = 9 cm, then QR is equal to:

5√2 cm in a circle. If the long chord makes a right angle at the centre, then what will be the length of the radius of the circle?

The ratio of circumradius and hypotenuse a right-angled triangle is

'G' is centroid of ΔABC if AG = BC then find ∠BGC.

The adjacent angles on a straight line are in the ratio 5 ∶ 4, then the smaller angle 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.

The ratio between the number of sides of two regular polygons is 1 : 2 and the ratio between there interior angles is 2 : 3. The number of sides of these polygons is respectively 

If △ABC is right angled at B, AB = 12 cm and ∠CAB = 60°, determine the length of BC.