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  • A sum of money under compound interest doubles itself in 4 years. In how many years will it become 16 times itself?   Option: 1 1

A sum of money under compound interest doubles itself in 4 years. In how many years will it become 16 times itself? 

 

Option: 1

12 years


Option: 2

16 years


Option: 3

8 years


Option: 4

None of these


Answers (17)

best_answer

if time is constant then the ratio of principal and amount is always constant in compound interest . 

in 4 years sum become doubled P become 2P
p _____4 years ____2p___4years _____8p ___4 years ____ 16 p
4+4+4+4= 16 years

Posted by

Pankaj

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16 years

Posted by

Sakshi Tripathi

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16 year 

Posted by

Babishaya

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C

Posted by

Pawan Rajendra Purkar

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8

 

Posted by

Sunnapu venkata Sai chandana priya

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16 years 

 

Posted by

Debjani Behera

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D

Posted by

Raghav

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Navi customer service and

Posted by

Ram

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Posted by

Ram

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Find the unknown length ×in the following figures 

 

Posted by

Kavya

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Ekart logistics customer care number 9832897581 ..Ekart logistics customer care number 9832897581 ...Ekart logistics customer care number 9832897581 ..Ekart logistics customer care number 9832897581 ...Ekart logistics customer care number 9832897581 ..Ekart logistics customer care number 9832897581 

Posted by

Kumar

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{\color{Orange} Let the dogits at ten's place be x and units place x+3 10(x+3)+x+11x+3= 143 x= 110\22=5 therefore 11multiply by 5+3= 58}

Posted by

Veggalam Rajitha

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8 years

Posted by

NARENDAR

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16

Posted by

Guru G

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16000

Posted by

Karishma Gupta

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16 years

Posted by

Karishma Gupta

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let p be the principle amount

After 4 years, the amount is 2p.

Using the compoubd intrest formula: 2p=p(1+r)4 

Divide both sides by p:2=(1+r)4

Take the fourth root of both sides: 1+r=2 1/4

Solve for r: r=2 1/4-1 

It will take 16 years 

Posted by

Khushi singh

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