A certain sum of money doubles itself in 8 years.Ib how much time it becomes 4 times of itself at the same rate of simple interest?
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tnwramit1:
four time of it is 4
means if some principal become 4 from 1
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the intrest is (4-1=3)
if in 8yr we get 1₹ interest on it
so we know simple interest of every yr is equal
then for earning 3 interest we have to wait for (8x3=24yr)
this is ur ans
still any doubt
if any doubt then I can explain it with bookish method
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