What equal annual instalment will pay off a debt of ₹3,630 due in 3 years at 10% per annum simple interest?
A. ₹1000
B. ₹1150
C. ₹1100
D. ₹1210
A. ₹1000
B. ₹1150
C. ₹1100
D. ₹1210
Best answer
Answer: C. ₹1100
Answer: (C) ₹1100
Instalments paid at the end of years 1, 2 and 3 earn interest for 2, 1 and 0 years until the due date.
So 3x + x × \(\frac{10}{100}\) × (2 + 1 + 0) = 3630, i.e. 3.3x = 3630 and x = ₹1100.
Trap: 3630 ÷ 3 = ₹1210 ignores the interest.
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