Staff Selection Commission Quantitative Aptitude — Question 275

Question

A sum of money becomes ₹13200 in 2 years and ₹13680 in 3 years at simple interest. Find the principal

1. ₹12000
2. ₹12240
3. ₹12480
4. ₹12720

Correct answer

D — ₹12720

Explanation (English)

SI for 1 year = 13680 - 13200 = 480. SI for 2 years = 960. P = 13200 - 960 = 12240... Recalc: P + 2R = 13200, P + 3R = 13680, R = 480, P = 12240

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