1.

1). 142). 163). 284). 20

Answer»

<P>Let suppose that principal is P

Difference between S.I and C.I is (D) = Rs. 18

The rate of interest (R) = 10%

⇒? $(\frac{R}{{100\;}} = \;\sqrt {\frac{D}{P}} )$

⇒? $(\frac{10}{{100\;}} = \;\sqrt {\frac{18}{P}} )$

P = 1800

Amount compounded half yearly = Rs. [1800 × (1 + 5/100)4] = Rs. 2187.91 = Rs. 2188

⇒ C.I. = Rs. (2188 – 1800) = Rs. 388

⇒ S.I. = Rs. (1800 × 10 × 2)/100 = Rs. 360

∴ C.I – S.I = Rs. (388 – 360) = Rs. 28



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