At what rate percent per annum wil will a sum of money double itself in eight years.
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after eight years the sum becomes amount
let sum p
after eight years the sum becomes double
2p means it becomes amount
simple interest is amount -principal
means 2p -p =p =si
rate of interest formula=si ×100÷principal ×time
=p×100÷p×8=12.5
let sum p
after eight years the sum becomes double
2p means it becomes amount
simple interest is amount -principal
means 2p -p =p =si
rate of interest formula=si ×100÷principal ×time
=p×100÷p×8=12.5
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