A certain sum amounts to Rs. 2584 at 15% p.a. simple interest in 2\(\frac{2}{5}\) years. Find double of the sum.

1900 2700 3250 3800

3800

Total rate = 15% × \(\frac{12}{5}\) = 36%                         ⇒ P × 136% = 2584 ⇒ P = \(\frac{2584}{136}\) × 100 = 1900 ⇒ 2P = 3800/-