allerySchool RD: ₹600 monthly for 12 months earns the same interest as 8 months at the same rate. New monthly sum?
A₹1,200
B₹900
C₹1,800
D₹1,300
Answer & Solution
Correct answer: D. ₹1,300
Equal interest requires the new instalment to be 600×12×13/(8×9), or ₹1,300.
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