Question
A sofa of MRP 27000 is available in Rs.5400 cash down
payment and 9 monthly equal installment of Rs.2700 each. Find the rate of interest per annum.Solution
Total interest = 5400 + 2700 x 9 – 27000 = Rs. 2700 2700 = (21600 + 18900 + 16200 + 13500 + 10800 +…. + 2700) x R x 1/ (12 x 100) 2700 = 97200 x R/1200 100 = 3R R = 100/3 %
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