Question
What is the ratio of the simple interest earned on a
certain amount at the rate of 21% per annum for 8 years to that earned on the same sum at the same rate for 21 years?Solution
ATQ, Simple interest = [(P × T × R)/100] Ratio of simple interest earned on certain amount at the rate of 21% p.a for 8 years and that for 21 years = (P × 8 × 21)/100 : (P × 21 × 21)/100 = 168 : 441 = 24:63 = 8 : 21
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