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Mathematics 7 Online
OpenStudy (anonymous):

A sum of money double in 20 years on simple interest . it will triple at the same rate in

OpenStudy (anonymous):

Ok so here it goes .... Interest = PRT . Let the principal be 'x' . x = x . R . T So , x / x = 20 . R . Thus R = 0.05. We want the interest to be 2x. Thus 2x = x . 0.05 . T , x = 0.05T. Is there more information in the question ? I got the interest rate but the later part requires more information I guess

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