1c:I[1254,["7330","static/chunks/d3ac728e-78c3d5d7a486ed3a.js","5159","static/chunks/5159-48592f0bf1a47f9d.js","8175","static/chunks/8175-f84d59b9bd013e10.js","8167","static/chunks/8167-b25693a0140130f2.js","664","static/chunks/664-f64584b506570f6e.js","3703","static/chunks/app/practice-question/%5Bslug%5D/page-d1408559b663b83f.js"],"PracticeQuestionCard"] 1b:T4b6,{"@context":"https://schema.org","@type":"QAPage","name":"A sum of money is compound interest became doubles itself in 15 years…","url":"https://vidyalelo.com/practice-question/a-sum-of-money-is-compound-interest-became-doubles-itself-in-15-years-it-will-become-eight-times-of-itself-in-89486","keywords":"practice questions, MCQ, MCQs with answers, objective questions, competitive exam questions, Competitive Exams, Competitive Exams MCQ, Competitive Exams MCQs, Competitive Exams questions, Competitive Exams practice questions, Aptitude, Aptitude MCQ, Aptitude MCQs, Aptitude questions, Aptitude practice questions, Compound Interest","mainEntity":{"@type":"Question","name":"A sum of money is compound interest became doubles itself in 15 years…","text":"A sum of money is compound interest became doubles itself in 15 years. It will become eight times of itself in = ?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Option A. 45 years. Answer & Solution Answer: Option A Solution: & P ( 1 + R100 )^15 = 2P & ( 1 + R100 )^15 = 2 & Let P ( 1 + R100 )^n = 8P & ( 1 + R100 )^n = 8 = 2^3 = \\ ( 1 + R100 )^15 \\^3 & ( 1 + R100 )^n = ( 1 + R100 )^45 & n = 45 & Required time = 45 years"}}}1d:T419,

Answer & Solution

Answer: Option A

Solution:

$$\eqalign{ & P{\left( {1 + \frac{{\text{R}}}{{100}}} \right)^{15}} = 2P \cr & \Rightarrow {\left( {1