a) Rs. 6000
b) Rs. 600
c) Rs. 1740
d) Rs. 120
Answer: b
Explanation:
Principal + SI for 2 year = Rs. 720 ….(i)
Principal + SI for 7 year = Rs. 1020 ….(ii)
Subtracting equation (i) from (ii)
SI for 5 years = (1020 – 720) = Rs. 300
SI for 1 years = Rs. 60
SI for 2 years = 60 × 2 = Rs. 120
Principal amount = (Amount after 2 years – 2 years SI) = (720 – 120)
Principal amount = Rs. 600
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