Question
Meera took Rs. 3600 at R% S.I. and Rs. 5400 at (R + 4)%
S.I. for 3 years. If the total interest amounted to Rs. 3888, find the rate on Rs. 5400.Solution
According to question, 3600 × R/100 × 3 + 5400 × (R + 4)/100 × 3 = 3888 108R + 162R + 162 × 4 = 3888 270R + 648 = 3888 270R = 3240 R = 12% So, R + 4 = 16%
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