Question
'P' invested a certain sum of
money for 2 years at an annual compound interest rate of 20% and earned a total interest of Rs. 6600. If the same amount was instead invested for 3.5 years at a simple interest rate of 12% per annum, what would be the simple interest earned by 'P'?Solution
Let amount = X ATQ, 
X×[1.2 2 -1]=6600 X×0.44=6600 X=15000 Required simple interest amount = (X×3.5×12)/100 = (15000 × 3.5 ×12)/100 = Rs.6300
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