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there is another method....similar...assume he is makin radios at rs.100....and he makes 100 radios....so 4 the first case he sells at rs.145(45% profit)...total sales is 145*100=14500...profit is Rs 4500(since C.P.=100*100=10000)....4 the second case he sells at rs.140(40% profit)...total sales is 145*110=15400..(110 bcoz 10%increase in sales).profit is Rs 4400(since C.P.=100*110=11000)....hence ratio is 44/45
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