In the figure above, seven congruent rectangles are assembled together perfectly to form a bigger rectangle of perimeter 130 cm. Find the area (in sq.cm) of the bigger rectangle.
Correct Answer : D
Find the total number of ways in which a black square and a white square can be selected from a chessboard such that both the squares lie either in the same row or in the same column.
P is a point outside the circle with centre O. If a straight line drawn through P intersects the circle at points A and B such that and 900 < ∠AOB < 1200, which of the following could be the radius (in cm) of the circle?
In the figure above, PQRS is a cyclic quadrilateral, where PQ = p cm, QR = q cm, RS = r cm and PS = s cm. If (PQ) (QR) = 3(PS) (RS) and ∠PQR =1200, then s =