Question

The selling price of 10 books
is equal to the cost price of 12 books. Find profit percent.

Answer 1

Let the SP of 10 books be rs. 100.

Then;

CP of 12 books is rs. 100 (ATQ)

SP of 1 book=100/10

= rs. 10

CP of 1 book=100/15

= 25/3

profit =10-25/3

=(30-25)/3

=5/3

profit%= profit/CP *100

= (5/3)/(25/3)×100

=20%

Mark it as brainliest answer....

Answer 2

Ｓｏｌｕｔｉｏｎｓ :－


ɢɪᴠᴇɴ :

Tʜᴇ sᴇʟʟɪɴɢ ᴘʀɪᴄᴇ ᴏғ 10 ʙᴏᴏᴋs ɪs ᴇϙᴜᴀʟ ᴛᴏ ᴛʜᴇ ᴄᴏsᴛ ᴘʀɪᴄᴇ ᴏғ 12 ʙᴏᴏᴋs


Fɪɴᴅ ᴛʜᴇ ʟᴄᴍ ᴏғ 10 ᴀɴᴅ 12 :-

ʟᴄᴍ ᴏғ 10 ᴀɴᴅ 12 ɪs 60

sᴏ, sᴇʟʟɪɴɢ ᴘʀɪᴄᴇ ᴏғ 10 ʙᴏᴏᴋs = ʀs 60
sᴇʟʟɪɴɢ ᴘʀɪᴄᴇ ᴏғ 1 ʙᴏᴏᴋs = ʀs 60/10 = ʀs 6

ᴄᴏsᴛ ᴘʀɪᴄᴇ ᴏғ 12 ʙᴏᴏᴋs = ʀs 60
ᴄᴏsᴛ ᴘʀɪᴄᴇ ᴏғ 1 ʙᴏᴏᴋs = ʀs 60/12 = ʀs 5


ɴᴏᴡ, ᴡᴇ ʜᴀᴠᴇ

Cᴏsᴛ ᴘʀɪᴄᴇ = ʀs 5
sᴇʟʟɪɴɢ ᴘʀɪᴄᴇ = ʀs 6


sᴇʟʟɪɴɢ ᴘʀɪᴄᴇ ɪs ɢʀᴇᴀᴛᴇʀ ᴛʜᴀɴ ᴄᴏsᴛ ᴘʀɪᴄᴇ.
Tʜᴇʀᴇғᴏʀᴇ, ᴘʀᴏғɪᴛ


Pʀᴏғɪᴛ = sᴘ - ᴄᴘ
= Rs (6 - 5)
= ʀs 1


ᴘʀᴏғɪᴛ ℅ = (ᴘʀᴘғɪᴛ × 100)/Cᴘ ℅
= (1 × 100)/5 ℅
= 100/5 ℅
= 20 %



ʜᴇɴᴄᴇ,

Hɪs ᴘʀᴏғɪᴛ ᴘᴇʀᴄᴇɴᴛ ɪs 20 %