Multiple choice

If a person invested 6000 at R% S.I for 3 year and same amount at (R + 5)% CI for 2 year and difference between both interest is 60 Rs. then find R ?(in %) यदि किसी व्यक्ति ने 3 वर्ष के लिए R% S.I पर 6000 और उसी वर्ष (R +5)% CI पर 2 वर्ष के लिए निवेश किया है और दोनों के बीच का अंतर 60 रु है तो R खोजें? (% में)

  1. 15

  2. 18

  3. 20

  4. 24

  5. None of these इनमे से कोई नहीं
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

SI on ₹6000 for 3 years at R% = (6000 × R × 3)/100 = 180R. CI on ₹6000 for 2 years at (R+5)% = 6000[(1 + (R+5)/100)² - 1] = 6000[(R+5)²/10000 + 2(R+5)/100] = 0.6(R² + 10R + 25) + 120(R+5). This simplifies, and the difference CI - SI = 60 gives R = 15%.

Keep practicing — related questions