Select the option that is related to the fifth number in the same way as
the second number is related to the first number, and the fourth number
is related to the third number: 10 : 55 :: 12 : 65 :: 18 : ?
A water tank is in the form of a cube of side 2 m. It has an inlet in the
shape of a circle with radius 3.5 cm. How long will it take to fill the tank
(approximately), if the water is flowing at a speed of 2 m/s?
Find x if ABCD is a parallelogram as given in the figure below, with two
diagonals AC and BD intersecting at O and OA = x + 3, OB = y + 2,
OC = 2x+ y, OD = 3y.