the simple interest of Rs 6400 in 7 years at 9% per annum will be the same as simple interest on Rs 12600 at 4% per annum in how many years
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Answer:
SI of 7yrs = 6400×9×7/100
SI of Tyrs = 12600×4×7/100
SI of 7yrs = SI of Tyrs
6400×9×7/100 = 12600×4×T/100
T = 6400×9×7/100×100/12600×4
T = 8yrs
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Answer is 8 years.
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