If an item is sold at $R s 990$ and at a profit of $10 %$ , then its $C P$ $=$ ………… $[R s 1089 / R s 900]$

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Solution

Given ,
Selling price of the item, $S P$ $=$ $R s 990$
profit per cent , $p r o f i t %$ $=$ $10 %$
Cost price of the item, $C P$ $=$ $. . . . . . . . . . . . . . .$
Note :
We have the formula to find $C P$ , When $S P$ and $p r o f i t %$ is given ,
i.e. $C P$ $=$ $\frac{100}{100 + p r o f i t %} \times S P$ .
So,
$C P$ $=$ $\frac{100}{100 + 10} \times 990$
$C P$ $=$ $\frac{100}{110} \times 990$
$C P$ $=$ $\frac{99000}{110}$ ( divide $99000$ by $110$ , we get $900$ )
$C P$ $=$ $900$ .
Therefore, the answer for the given blank is $R s 900$ .

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