Which of the following statements is false?

Let a = 10 cm, b = 3 cm and c = 6 cm. Which of the following is true?

In a quadrilateral ABCD, AB = 6 cm, BC = 18 cm, CD = 6 cm and DA = 10 cm. If the diagonal BD = x, then which one of the following is correct?

Select the most suitable statement.

The length of a room is 21/16 times its breadth and breadth is 4/3 times its height. If H is the height of the room and L is the longest rod that can be placed in the room, then which one of the foll…

The base of a triangle is 15 dm and its height is 12 dm. The height of another triangle of double the area and the base of which is 20 dm, is given by