Question

a marchent purchased number of coates each at same prise for rs 720. he sold them at rs40 each thus making a profit equal to cost of 8 coats how many did he buy

i will mark as brainliest the right answer​

Answer 1

Step-by-step explanation:

no. of coats =n

purchase cost per coat =720/n

total return =40/n

profit =40n-720n

cost of 8 coat=8(720/n)

40n-720n=8n(720n)

40n^2-720n-5760=0

n2-18n-144=0

n=24 or n=6 rejecting the negative

he bought 24 coats

check:

cost per coat=720/24=$30

cost of 8 coat =$240

profit on each coat =$10

total profit =24(10)=$240