Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

ICSE Class 10 Answered

Beena has a cumulative deposit account of ₹400 per month at 10% per annum simple interest. If she gets ₹30100 at the time of maturity, find the total time for which the account was held.
Asked by www.adityakumarjaiswal622 | 21 Jan, 2019, 07:55: AM
answered-by-expert Expert Answer
If p is deposit amount every month and r is rate of interest, then interest I of cumulative deposit for n months is given by
 
begin mathsize 12px style I space equals space p cross times fraction numerator n left parenthesis n plus 1 right parenthesis over denominator 2 cross times 12 end fraction cross times r over 100 end style
hence we have, begin mathsize 12px style 400 cross times fraction numerator n open parentheses n plus 1 close parentheses over denominator 2 cross times 12 end fraction cross times 10 over 100 space equals space 30100 space minus space 400 n end style
above equation is simplified as : n2 + 241n - 18060 = 0 ..............(1)
 
after factorising LHS of eqn.(1), it is rewritten as,  (n+301)(n-60) = 0
 
hence n = 60 months = 5 years
Answered by Thiyagarajan K | 21 Jan, 2019, 08:19: AM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
ICSE 10 - Maths
if a is an acute angle and sec a = 17/8, find all other trigonometric rarios of angle a ( using trigonometric indentities).
Asked by aritramalakar4 | 13 Apr, 2024, 08:33: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 10 - Maths
3√2x×x-5x-√2
question image
Asked by ashwanikaler9 | 11 Apr, 2024, 01:50: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 10 - Maths
prove that
question image
Asked by botlarajshekhar | 22 Mar, 2024, 09:37: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 10 - Maths
Mr. Gupta invested Rs. 33000 in buying Rs.100 shares of a company at 10% premium. The dividend declared by the company is 12% . Find: (a) the number of shares purchased by him. (b) his annual dividend
Asked by sagarmishra | 15 Mar, 2024, 03:22: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 10 - Maths
 (a+b)²
Asked by dadoosumeksha | 13 Mar, 2024, 09:26: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 10 - Maths
sheethal has a recurring deposit account in a bank and deposit rupees 300 and at rate of interest of 7℅ and recieved rupees 7725 on maturity, find the time which would the account will be held
Asked by jesnamariaroy2626 | 10 Mar, 2024, 11:28: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 10 - Maths
if abc are in Continued proportion then prove that 3a2-4ab+5b2/3b2-4bc+5c2=a/c
Asked by vrj.parmar369 | 07 Mar, 2024, 11:27: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 10 - Maths
sole
question image
Asked by ronaldlhouvum | 22 Feb, 2024, 02:42: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 10 - Maths
7/9÷2/3
Asked by kvanshulkumar613 | 20 Feb, 2024, 12:03: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 10 - Maths
(4a+9)²
question image
Asked by mangadoddiswarnalatha | 19 Feb, 2024, 06:03: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×