a) Rs. 121
b) Rs. 127
c) Rs. 210
d) Rs. 225
Answer: a
Explanation: Let X = equal installment at the end of one year( rate% annually) .
Now 1st year,
P =210,
Interest = $$\frac{{{\text{PTR}}}}{{100}}$$ = 210 * 0.1 = 21.
Let X is to be paid as an equal installment.
At the beginning of 2nd year,
P = 210 + 21 – X,
Interest at the end of 2nd year,
= (231 – X) * 0.1 = 23.1 – 0.1X.
Total installment,
2X = 210 + 21 + 23.1 – 0.1X,
X = $$\frac{{{\text{254}}{\text{.1}}}}{{2.1}}$$ = 121.
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