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ICSE Class 10 Answered

A man income increases by rupees 3 by converting a 3½% stock at 63 into 5% at 75. Find the stock he has
Asked by aryanhalder568 | 10 Aug, 2021, 08:24: PM
answered-by-expert Expert Answer
Let value of the stock = a
Now, 1st income at 3 1/2% at 63 = straight a cross times fraction numerator 3 begin display style 1 half end style over denominator 63 end fraction equals fraction numerator 7 straight a over denominator 126 end fraction
2nd income at 5% at 75 = straight a cross times fraction numerator begin display style 5 end style over denominator 75 end fraction equals straight a over 15
fraction numerator 7 straight a over denominator 126 end fraction plus 3 equals straight a over 15
straight a over 18 plus 3 equals straight a over 15
rightwards double arrow 3 equals straight a over 15 minus straight a over 18
rightwards double arrow 3 equals fraction numerator 3 straight a over denominator 270 end fraction
rightwards double arrow 3 equals straight a over 90
rightwards double arrow straight a equals Rs.270
Answered by Renu Varma | 11 Aug, 2021, 11:53: AM
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