A sum of 8000 invested in A at S.I at R% per annum and get some interest. Now he invested total amount received from A in B at S.I for same time period at 10% per annum and received 2080 interest. Find the value of R??
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Step-by-step explanation:
A sum of 8000 invested in A at S.I at R% per annum and get some interest.
SI = PNR/100
= 8000 *1*R/100
SI = 80R
A = P + SI = 8000+ 80R
he invested total amount received from A in B at S.I for same time period at 10% per annum and received 2080 interest
SI = PNR/100
2080 = (8000+80R) * 1 * 10 / 100
20800 = 8000 + 80R
80R = 20800 - 8000
80R = 12800
R = 160 = 16%
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