Question
At simple interest, a certain sum of money amounts to
₹1,250 in 2 years and to ₹2,000 in 5 years. Find the rate of interest per annum (rounded off to two places of decimal).Solution
ATQ, Find interest for 3 years = 2000−1250 = 750 Interest for 1 year = 750÷3=250 Principal (P) = P=1250−(250×2) = 750 
Substitute values = R = [(250×100)/(750×1)] = 33.33%
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