Question
A invested Rs.600 at r% rate of simple interest for 20
months while B invested Rs.900 at 16% rate of simple interest for r months. If they together received Rs.308 as interest, then find the value of 'r'.Solution
Simple interest = sum * rate * time/100
308 = 600 * r * (20/12)/100 + 900 * 16 * (r/12)/100
308 = 22r
r = 14
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