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IB exams If a sum of money at simple interest doubles in 6 years, it will become 4 times in ? |
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Answer» of money = Pit doubled in 6 yearsA = 2PT = 6 yrsI = A - P = 2P - P = PI = PTR⇒ P = P×6×R ⇒ R = 1/6TO become 4 TIMES,A = 4PI = 4P - P = 3PT = ?I = PTR⇒3P = P×T×(1/6)⇒ T = 6×3 = 18yrs |
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