a) Rs. 1,20,000
b) Rs. 1,25,000
c) Rs. 1,50,000
d) Rs. 1,70,000
Answer: d
Explanation:
$$\eqalign{
& {\text{Let the sum be Rs}}{\text{. }}x{\text{ and}} \cr
& {\text{original rate be R}}\% \cr
& \frac{{x \times \left( {{\text{R}} + 1} \right) \times 3}}{{100}} – \frac{{x \times {\text{R}} \times 3}}{{100}} = 5100 \cr
& 3{\text{R}}x + 3x – 3{\text{R}}x = 510000 \cr
& 3x = 510000 \cr
& x = 170000 \cr
& {\text{Sum}} = {\text{Rs}}.170000 \cr} $$
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