a) Rs. 2000
b) Rs. 30000
c) Rs. 4000
d) Rs. 5000
Answer: b
Explanation: Suppose Ramesh invested Rs. x.
Manoj : Ramesh = 120000 × 6 : x × 12.
$$\eqalign{
& \frac{{720000}}{{12{\text{x}}}}:\frac{{6000}}{{3000}} \cr
& {\text{x}} = \frac{{720000}}{{24}} \cr
& {\text{x}} = 30000 \cr} $$
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