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Find the rate at Simple interest, at which a sum becomes four times of itself in 15 years. |
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Answer» R = 20% Step-by-step EXPLANATION: Time = 15years Amount = 4xsum = 400 SI = A - P = 400 - 100 = 300 R = SI×100/P×T = 300×100 / 100×15 = 20% p.a |
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