Arithmeticeasy · Past Paper
Formula for semi-annual compound amount:
AA = P(1 + R/100)^T
BA = P(1 + R/200)^2T
CA = P(1 + 2R/100)^T/2
DA = P(1 + R/400)^4T
✓ Correct Answer: B — A = P(1 + R/200)^2T
Rate is halved (R/2) and time is doubled (2T), leading to R/200 and 2T in the power.
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