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arithmetic

PROFITS AND LOSS|Part-2

Ex: What is the percentage of profit per annum by which Tk. 13000 will be Tk. 18850 as profit-principal in 5 years? Solution: In 5 years profit principal is  18,850 Taka Principal is                             13,000 Taka ∴5 years profit                         =5850 Taka For 13000 Taka in 5 years profit is 5850 Taka ...

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A sum of interest Tk. 750 at the interest of 8% and another sum of Tk. 1250 at 6% were invested. What is the average percent rate of interest of the total sum of interest?

Solution: For 1st one, the rate of interest = 8% Principle = Tk. 750 For second one, The rate of interest = 6% Principle = Tk. 1250 Interest of Tk. 100 in 1 year = Tk. 8 ∴ ”            ”  ”         ...

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Walid borrowed Tk. 400 for 3 years and Tk. 600 for 5 years and gave a total of Tk. 168 as interest. If the rates of interests are equal for both, what is the rate for interest?

Solution: Let for the both, rate of interest =Tk. x So, Interest on Tk. 100 in 1 year = x% So, interest on Tk. 100 in 1 year = Tk. x ∴ ”      ‘’          ‘’            1    ‘’ 1 ‘’ = (x÷100) ∴ ”       ‘’         ‘’          ...

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