a sum of money at simple interest double it sells in 15 years and how many years will it become eight times the sum of money
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let sum be rs x
amount =2x
si = 2x-x = x
time = 15 yrs
r %= x×100/x×15
20/3%
let sum be x
amount =8x
si = 8x-x = 7x
time = 7x×100×3/x×20
amount =2x
si = 2x-x = x
time = 15 yrs
r %= x×100/x×15
20/3%
let sum be x
amount =8x
si = 8x-x = 7x
time = 7x×100×3/x×20
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