Which term of the Arithmetic Progression (A.P.) 15, 30, 45, 60 ….. is 300 ? Hence find the sum of all terms of the Arithmetic Progression (A.P.).

From the top of a tower 100 m high, a man observes the angle of depression of two ships A and B, on opposite sides of the tower as 45° and 38° respectively. If the foot of tower and the ships are in the same horizontal line, find the distance between two ships A and B to the nearest metre.

Use graph paper to answer this question.

During a medical checkup of 60 students in a school, weights were recorded as follows :

Taking 2 cm = 2 kg along one axis and 2 cm = 10 students along the other axis draw an ogive. Use your graph to find the :

(a) median

(b) upper quartile

(c) number of students whose weight is above 37 kg.