**Question:**

A sum of money at compound interest doubles itself in 15 years,it wil become eight times of itself in

Firstly apply power relation between time i.e between 2 and 8 which is 2 power 3 then use mulitly relation i.e given year*power i.e15 *3=45

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45

45

45 __yr__

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Thank u vipin

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Then copoud intert is=x(1+r\100)^15=2x

Find (1+r\100)which is 2^1\15 then again put x(1+r\100)^T=8x put value of (1+r\100) then become 2^T\15=2^3 find T

@vipin pls giv __xplanation__

45