(i) A =
Find the values of x and y, if AB = C.

(ii) A solid metallic cylinder is cut into two identical halves along its height (as shown [4 in the diagram). The diameter of the cylinder is 7 em and the hei ght is 10 cm. Find:
(a) The total surface area (both the halves).
(b) The total cost of painting the two halves at the rate of Rs 30 per cm² [Use π=22/7]


(iii) 15, 30, 60, 120... are in G.P. (Geometric Progression).
(a) Find the nth term of this G.P. in terms of n.
(b) How many terms of the above G.P. will give the sum 945?

Solution

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