If both the square root and the cube root of a three digit natural number belongs to the set of natural numbers, then the sum of its digits is –

The length of a diagonal of a cuboid is 11 cm. 63. The surface area is 240 square cm. What is the sum of its length, breadth and height ?

The ratio of the area of a square to that of the square drawn on its diagonal is

If the area of a square is equal to the area of an equilateral triangle, the ratio of the side of the square and the side of the equilateral triangle is

If the perimeter and the area of a circle are numerically equal, then the radius of the circle is

X, Y and Z are three equilateral triangles. The sum of the areas of X and Y is equal to the area of Z. If the side lengths of X and Y are 6 cm and 8 cm respectively, then what is the side length of Z?