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Bihar Police SI Prelims 2020: Full Mock Test 100 Questions 200 Marks 120 Mins Let, the sum be Rs x and Rate of interest be r% According to the question, 2x = x (1 + r/100)15 ⇒ (1 + r/100)15 = 2 ----(i) Now, Required amount = 8x Let time period be ‘t’ years 8x = x(1 + r/100)t ⇒ (1 + r/100)t = 8 = 23 ⇒ (1 + r/100)t = [(1 + r/100)15]3 [from (i)] ⇒ (1 + r/100)t = (1 + r/100)45 ⇒ t = 45 ∴ In 45 years, it will become 8 times. Latest Bihar Police SI Updates Last updated on Sep 22, 2022 Bihar Police Sub-Ordinate Service Commission (BPSSC) has activated the link to download the mark sheet of Bihar Police Sub Inspector on 21st August 2022. The candidates, who appeared for Bihar Police SI exam, must check their results before 4th September 2022. For Bihar Police vacancy 2020, the BPSSC had released as many as 1998 vacancies for the post of sub-inspector and 215 vacancies for the post of sergeant. Those who could not make it to the final merit list, should not lose their heart as the notification for 2022 is expected to be out very soon. Let's discuss the concepts related to Interest and Compound Interest. Explore more from Quantitative Aptitude here. Learn now! Open in App Solution Let sum of money be P=100Interest per annum =10% amount = 2× 100 = 200 simple interest = 200 - 100 = 100Since, SI=PTR100⇒T=100×SIPR=100×100100×10∴t=10 years.Similar questions Q. A certain sum of money lent out at a certain rate of interest per annum,
doubles itself in 10 years. In how many years will it treble itself? Q. In how many years will a sum of money double itself at 4% per annum ? Q. At what rate percent per annum simple interest will a sum of money double itself in 6 years? Q. A sum of money lent out at C.I. at a certain rate per annum doubles itself in 5 years. Find in how many years will the money become eight times of itself at the same rate of interest p.a. Q. At what rate percent per annum will a sum of money double itself in 10 years. View More At what rate of percent a sum will double itself in 10 years?Hence the required rate in which the sum becomes double itself in 10 years is 10%.
In what time will a sum of money double itself at 5% compound interest payable half yearly?Therefore, the number of years it will take to double the money at 5% per annum when compounded annually is 12.5 years.
For what time in years a sum of money will become 4 times itself at 10% pa?=(x×4100×x)years = 25 years.
In what time a sum will double itself at 12% annual rate of simple interest?In this problem, it is given that the rate is 12 % per annum and we need to find the time in which the principal amount doubles. The total amount at the end of N years is the sum of simple interest and the principal amount. Hence, the required time is 8 years and 4 months.
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In what time will a sum of money double itself at 10% compound interest payable half yearly?
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