Q1 · medium
A sum at 10% p.a. simple interest amounts to ₹6,000 in 4 years. Find the principal.
- A₹4,285
- B₹4,500
- C₹4,000
- D₹4,200
Explanation
A = P(1 + RT/100) → 6000 = P(1 + 0.4) = 1.4P. P = 6000/1.4 ≈ ₹4,285.71.
Profit & loss, SI/CI, time-work, speed-distance, ages, partnership, probability.
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A = P(1 + RT/100) → 6000 = P(1 + 0.4) = 1.4P. P = 6000/1.4 ≈ ₹4,285.71.
A = 10000 × 1.1² = 12100. CI = 12100 − 10000 = ₹2,100.
1/A + 1/B = 1/12 → 1/B = 1/12 − 1/20 = (5-3)/60 = 2/60 = 1/30. B = 30 days.
SP = 800 × 0.85 = ₹680.
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