Arithmetichard · Past Paper
If Rs. X amounts to Rs. Y in 2 years at CI, what is the rate?
A100(sqrt(Y/X) - 1)
B100(Y/X - 1)
Csqrt(Y/X)
D100(sqrt(X/Y) - 1)
✓ Correct Answer: A — 100(sqrt(Y/X) - 1)
Y = X(1 + R/100)^2 => sqrt(Y/X) = 1 + R/100 => R = 100(sqrt(Y/X) - 1).
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