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प्रश्न
At what rate per cent per annum will Rs. 630 produce an interest of Rs. 126 in 4 years ?
उत्तर
P = Rs. 630, I = Rs. 126, T = 4 years
`"R" =(100xx"I")/("P"xx"T")=(100xx126) /(630xx4) = 100/ 20 =5%`
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