Question

If the selling price is doubled, the profit triples. Find the profit per cent

• A. $66\frac{2}{3}\%$
• B. $100\%$
• C. $105\frac{1}{3}\%$
• D. $120\%$

Answer 1

Answer: (B)

$100\%$

Let C.P be Rs.x S.P be Rs.y

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

$\Rightarrow 3y-3x=2y-x$

$\Rightarrow 3y-2y=3x-x$

$\Rightarrow y=2x$

$Profit=(y-x)\Rightarrow (2x-x)\Rightarrow Rs.x$

$\therefore Profit\%=\frac{x}{x}\times 100=100\%$