Math Problem Statement
Raghu borrowed Rs.80,000 at a certain rate of simple interest payable at the end of 7 years. After 2 years, he repaid Rs.60,000 towards the principal and after 5 more years, he repaid Rs.72,000 to settle his loan. Find the rate of interest per annum.
Solution
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Math Problem Analysis
Mathematical Concepts
Simple Interest
Algebra
Formulas
Simple Interest formula: I = (P × r × T) / 100
Remaining principal after partial repayment: P2 = P1 - Repayment
Total repayment after interest: P2 + Interest
Theorems
Simple Interest Theorem
Suitable Grade Level
Grades 9-10
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