Page 113 - New Medley 5 Semester 2
P. 113
Example 8 : Find the cost price of a necklace if its selling price is
`720 and profit percent is 20%.
Solution: Given, S.P. = `720 and P% = 20%
Let the C.P. of the necklace be `100.
Since profit is 20% of C.P., so
20
Profit = 20% of `100 = × `100 = `20
100
Therefore, S.P. = `100 + `20 = `120
When S.P. is `120, the C.P. is `100.
100
When S.P. is `1, the C.P. is ` .
120
100
When S.P. is `720, the C.P. is ` × 720 = `600.
120
Thus, the cost price of the necklace is `600.
EXERCISE 3.2
A. Complete the following table.
C.P. S.P. Profit Loss Profit%/Loss%
1. `40 `48
2. `80 `76
3. `120 `24 ×
4. `700 × `100
5. `9000 × `900
6. `50000 `10000 ×
111
