4पपमा जम्मा प्याज कात घुमाया होला।
a man borrowed rs 18,000 for 2 years at 12% p. a.
compounded annually. he paid only half of the principal after
2 years and the remaining principal and interest at the same
rate but compounded semi-annually after next two years,
how much interest was paid in those 4 years? ans: rs 8143.43