Certain principal amounts to rs.15000 in 2.5 years and to rs.16500 in 4 years at the same rate of interest. Find the rate of interest.
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Step-by-step explanation:
15000-(SI)1st=16500-(SI)2nd
(SI)1st=15000×r×2.5 /100
(SI)2nd=16500×r×4 /100
15000-375r=16500- 620r
245r=1500
r=6.24
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