The angle of elevation of the top of a tower from the two points P and Q at distances of a and b(a>b) respectively from the base and in the same straight line with it are complementary. The height of the tower is:
The radii of two circles are 14cm and 18cm respectively. Find the radius of the circle having its area equal to the sum of the areas of the two circles.
A object is in the form of a hollow hemisphere mounted by a hollow cylinder. The diameter of the hemisphere is 16 cm and the total height of the object is 78 cm, then choose the correct inner surface area of the object.
Two coins are tossed simultaneously 900 times and it is found that two tails appeared 450 times, one tail appeared 270 times and no tails appeared 180 times.
If two coins are tossed at random, what is the probability of getting 1 tail ?
Faces of a cube are marked with A,B,C,D,E and F. Two views of cube are as shown below, if face C is opposite to face B, what will be there on the top when D is at the bottom?
In this diagram, the triangle represents women, the square represents engineers and the circle represents employed. Find the number of engineers who are employed but not women.