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1. A man purchased a cow for Rs. 3000 and sold it the same day for Rs. 3600, allowing the buyer a credit of 2 years. If the rate of interest be 10% per annum, then the man has a gain of:

A. 0%

B. 5%

C. 7.5%

D. 10%

Solution:

\begin{aligned} C .P . = R s . 3000 \\ S .P . = R s . [\frac{3600 \times 100}{100 + (10 \times 2)}] \\ = R s . 3000 \\ Gain = 0 % \end{aligned}

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