If ‘#’ denotes ‘-‘, @ denotes ‘×’, ‘$’ denotes ‘+’ and ‘%’ denotes ‘÷’, then 

20 $ 15 # 10 @ 45 % 15

The lengths of three medians in a triangles are 21 cm, 28 cm, 35 cm. What is the area of that traingle (in cm ² )?

Find the radius of the sphere whose volume is 562.5Ï€ cm³

ABCD is a square. P, Q, R and S are points on the sides AB, BC, CD and DA respectively such that AP = BQ = CR = DS. Angle  SPQ equal to ?

The area of the largest triangle inscribed in a semi-circle of radius R is-

A circular clock has the hour hand of length 42 cm. Find the length of the distance it covers by its tip from 11 p.m. to 3 a.m.

In the given figure. ABCDEF is a regular hexagon whose side is 6 cm. APF, QAB, DCR and DES are equilateral triangles. What is the area (in cm²

In ∆ABC , G is the centroid , AB = 5 cm, BC= 6 cm and AC = 7 cm , find GD, where D is the mid-point of BC?

ABC is an isosceles triangle inscribed in a circle. If AB = AC = 12√5 and BC = 24 cm then radius of circle is