The toatl interest of a principal in n yrs.at the rate of simple interest of r%per annum is
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Step-by-step explanation:
P x r x t/100 =pnr/25p x r x n /100 x 25 = pnr
P x r x t/100 =pnr/25p x r x n /100 x 25 = pnr100 = 1
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