Question

If selling price is doubled, the profit triples. The profit percent is

• A. 50%
• B. 100%
• C. 120%
• D. None of these
  

Answer 1

The correct option is B 100%

Let $CP$ be Rs. $x$ and $SP$ be Rs. $y$.

Then profit = Rs. $(y-x)$

Again, $SP=$ Rs. $2y$

Profit = Rs. $3(y-x)$

$CP=SP-$ Profit

$=2y-3(y-x)=3x-y$

Therefore,

$3x-y=x$

$y=2x$

Profit % $=\frac{2x-x}{x}=\frac{x}{x}\times 100=100$ %