Find the C.P., when: (i) S.P. = Rs. 12;gain=20% (ii) S.P. = Rs. 360; loss=10%
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Solution
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Let say CP=x
(1) ∴SP=CP+P100×CP
12=x+20100×x
12=x+x5
It gives: x=10Rs
∴CP=10RS
(2) Let say CP=y
∴SP=CP−L100×CP
360=y−10100×y
360=y−y10
It gives y=400Rs
∴CP=400Rs
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