Question

By selling a calculator at $Rs510$, a man loses $15\%$, . At what price should he sell it to gain $15\%$?

• A. $Rs690$
• B. $Rs600$
• C. $Rs720$
• D. $Rs660$

Answer 1

The correct option is A $Rs690$

Given $\to \text{Loss}=15\%SP=510Rs.$

To find $\to CP$

$SP=\frac{100-\text{Loss}\%}{100}\times CP510=\frac{100-15}{100}\times CPCP=510\times \frac{100}{85}CP=600Rs.$

Let new $SP=S{P}^{{}^{\prime }}S{P}^{{}^{\prime }}=\frac{100+\text{Profits}\%}{100}\times CP=\frac{100+15}{100}\times 600=\frac{115}{100}\times 600S{P}^{{}^{\prime }}=690Rs.$