A man sold his bicycle for ₹ 405 losing one-tenth of its cost price. Find:

(i) its cost price;

(ii) the loss percent.

Mr. Sinha sold two tape recorders for ₹ 990 each, gaining 10% on one and losing 10% on the other. Find his total loss or gain, as percent, on the whole transaction.

A tape recorder is sold for ₹ 2,760 at a gain of 15% and a C.D. player is sold for ₹ 3,240 at a loss of 10%. Find

(i) the C.P. of the tape recorder.

(ii) the C.P. of the C.D. player.

(iii) the total C.P. of both.

(iv) the total S.P. of both.

(v) the gain % or the loss% on the whole.