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What is known: Principal, Time Period, and Rate of Interest What is unknown: Amount and Compound Interest (C.I.) Reasoning: A = P[1 + (r/100)]n P = ₹ 10,000 n = \(1{\Large\frac{1}{2}}\) years R = 10% p.a. compounded annually and half-yearly where , A = Amount, P = Principal, n = Time period and R = Rate percent For calculation of C.I. compounded half-yearly, we will take the Interest rate as 5% and n = 3 A = P[1 + (r/100)]n A = 10000[1 + (5/100)]3 A = 10000[1 + (1/20)]3 A = 10000 × (21/20)3 A = 10000 × (21/20) × (21/20) × (21/20) A = 10000 × (9261/8000) A = 5 × (9261/4) A = 11576.25 Interest earned at 10% p.a. compounded half-yearly = A - P = ₹ 11576.25 - ₹ 10000 = ₹ 1576.25 Now, let's find the interest when compounded annually at the same rate of interest. Hence, for 1 year R = 10% and n = 1 A = P[1 + (r/100)]n A = 10000[1 + (10/100)]1 A = 10000[1 + (1/10)] A = 10000 × (11/10) A = 11000 Now, for the remaining 1/2 year P = 11000, R = 5% A = P[1 + (r/100)]n A = 11000[1 + (5/100)] A = 11000[(105/100)] A = 11000 × 1.05 A = 11550 Thus, amount at the end of \(1{\Large\frac{1}{2}}\)when compounded annually = ₹ 11550 Thus, compound interest = ₹ 11550 - ₹ 10000 = ₹ 1550 Therefore, the interest will be less when compounded annually at the same rate. ☛ Check: NCERT Solutions for Class 8 Maths Chapter 8 Video Solution: Find the amount and the compound interest on ₹ 10,000 for \(1{\Large\frac{1}{2}}\) years at 10% per annum, compounded half yearly. Would this interest be more than the interest he would get if it was compounded annually?NCERT Solutions Class 8 Maths Chapter 8 Exercise 8.3 Question 8 Summary: The amount and the compound interest on ₹ 10,000 for \(1{\Large\frac{1}{2}}\) years at 10% per annum, compounded half-yearly is ₹ 11576.25 and ₹ 1576.25 respectively. The interest will be less when compounded annually at the same rate. ☛ Related Questions:
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What is the compound interest on 10000 in 2 years?∴ C.I. = ₹(10824.32 - 10000) = ₹824.32.
What will be the amount of Rs 10000 in 4 years at 5% per annum compound interest?[10000xx(11/10)^(4)]= Rs. 14641`. <br> Hence, the amount after 4 years is Rs. 14641.
What will be the CI of Rs 10000 at 5% per annum for 3 years?The answer is 1576.25!!
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Find the compound interest on rs. 10000 at 5% per annum for 2 years, compounded annually.
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