Question

answer me plspls mememe

Answer 1

Let the CP of a notebook be x

$x + 30\% \: of \: x = 52$

$x + \frac{30}{100 } \times x = 52$

$x + \frac{30x}{100} = 52$

$\frac{100x + 30x}{100} = 52$

$130x = 52 \times 100$

$x = \frac{5200}{130}$

$x = 40$

$The \: C. P\: of \: a \: notebook \: is \: 40$

Now,

$To \: make \: a \: profit \: of \: 40\%$

$= 40\% \times 40$

$= \frac{40}{100} \times 40$

$= 16$

We can find the required answer with the help of given formula,

$S. P= C. P+ profit$

$S. P= 40 + 16$

$S. P= 56$

$\therefore \: he \: should \: sell \: it \: in \: Rs\: 56 \: to \: gain \: 40\%$