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A certain sum of money doubles …

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A certain sum of money doubles itself at simple interest in 8 yrs. In how many yrs will it be three times at the same rate ?

Posted by Ashish Pal 6 years, 11 months ago

Teacher Exams > CTET and State TET > Syllabus and Question Papers

1 answers

Rajeev Malhotra 6 years, 11 months ago

let the sum= Rs 100, T= 8 years Amount = 200, So simple interest = 200-100=100

S.I = P*R*T/100

100=100*R*8/100

8R = 100

R=100/8= 25/2

Now R = 25/2% , P =Rs 100, Amount = Rs 300, So Simple Interest = 300-100=200

200=100*25/2*T/100

200= 25T/2

T = 200*2/25

T=8*2 = 16 years

0Thank You

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