A sector of a circle of radius 7cm subtending an angle of 270° at the centre of the circle is used to form a cone.

(a) Find the base radius of the cone.

(b) Calculate the area of the base of the cone to the nearest square centimetre.

[Take \(\pi = \frac{22}{7}\)]

(a) The subsets A, B and C of a universal set are defined as follows :

A = {m, a, p, e} ; B = {a, e, i, o, u} ; C = {l, m, n, o, p, q, r, s, t, u}. List the elements of the following sets.

(i) \(A \cup B\) ; (ii) \(A \cup C\) ; (iii) \(A \cup (B \cap C)\).

(b) Out of the 400 students in the final year in a Senior Secondary School, 300 are offering Biology and 190 are offering Chemistry.

(i) How many students are offering both Biology and Chemistry, if only 70 students are offering neither Biology nor Chemistry? (ii) How many students are offering at least one of Biology or Chemistry?

Illustrate the following on graph paper and shade the region which satisfies all the three inequalities at the same time :

\(- x + 5y \leq 10 ; 3x - 4y \leq 8\) and \(x > -1\).

The table below is for the relation \(y = 2 + x - x^{2}\)

(a) Using a scale of 2cm to 1 unit on each axis, draw the graph of the relation in the interval \(-2 \leq x \leq 3\).

(b) From your graph, find the greatest value of y and the value of x for which this occurs.

(c) Using the same scale and axes, draw the graph of \(y = 1 - x\)

(d) Use your graphs to solve the equation \(1 + 2x - x^{2} = 0\)

Two towns K and Q are on the parallel of latitude 46°N. The longitude of town K is 130°W and that of town Q is 103°W. A third town P also on latitude 46°N is on longitude 23°E, Calculate:

(i) the length of the parallel of latitude 46°N, to the nearest 100km;

(ii) the distance between K and Q, correct to the nearest 100km;

(iii) the distance between Q and P measured along the parallel of latitude, to the nearest 10km.

[Take \(\pi = 3.142\); Radius of the earth = 6400km]