Question

An article marked at r.s 800is sold at a discount of 10%. Find its cost price if the dealer makes a profit of 20%. Also ,find the profit %if no discount had been allowed

Answer 1

hello...


 ᴍᴘ = 800

ᴅɪsᴄᴏᴜɴᴛ= 10%

sᴘ = 90 / 100 * 800 =720

ᴀs ʜᴇ ɪs sᴛɪʟʟ ɢᴀɪɴɪɴɢ 20%

ᴄᴘ = 100 / 120 * 720

= 600.




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Answer 2

Step-by-step explanation:

Solution :

Let the number of 10 rupees note be x and 20 rupees not be ( 50 - x)

Total sum = 800

Now,

10 rupee notes = 10x and

20 rupee notes = 20(50 - x)

According to the question :

$\longrightarrow \sf \: 10x + 20(50 - x) = 800⟶10x+20(50−x)=800</p><p></p><p>[tex]\longrightarrow \sf \:$10x + 1000 - 20x = 800⟶10x+1000−20x=800

$\longrightarrow \sf \:$ 10x - 20x + 1000= 800⟶10x−20x+1000=800

$\longrightarrow \sf \:$- 10x = 800 - 1000⟶−10x=800−1000

$\longrightarrow \sf \:$ - 10x = - 200⟶−10x=−200

$\longrightarrow \sf \:$x = \dfrac{200}{10}⟶x=

10

200

$\longrightarrow \sf \:$x =20⟶x=20

$\therefore∴$ Number of 10 rupee notes = 20 and number of 20 rupee notes = (50 - 20) = 30