Question

a sum of 12000 deposited compund interest become double affter 5 years after 20 years will be

Answer 1

Answer : [D] 192000
Explanation :

12000 (1 + R/100)^5 = 24000
(1+R/100)^5 =2
[ (1+R/100)^5 ]^4 =2^4
(1+R/100)^20 =16
p (1+R/100)^20 =16 p
12000 (1+R/100)^20 =16*12000
=192000
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Answer 2

HEY DEAR ...

12000 (1 + R/100)^5 = 24000
(1+R/100)^5 =2
[ (1+R/100)^5 ]^4 =2^4
(1+R/100)^20 =16
p (1+R/100)^20 =16 p
12000 (1+R/100)^20 =16*12000
=192000

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