If Rs. 2800 amount to be Rs. 3696 in 4 years at S.I., find what sum will amount to Rs. 6336 in 11 years at half the rate.

Explanation:

3696 – 2800 = $\frac{2800\times R\times 4}{100}$

⇒ R = 8%

Now, 6336 – P = $\frac{P\times {\displaystyle \frac{8}{2}}\times 11}{100}$

⇒ P = 4400

Hence, option (a).

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