Question

On selling a mobile for Rs9000/- a shop keeper loses 10percent for what amount should he sell it to gain 10 percent.​

Answer 1

Answer:

10500 rupees

Step-by-step explanation:

SP=9000

loss=10%

let the cost price of mobile be x rupees

we know that

loss%=(cp-sp upon cp)x100

10=x-9000 upon x mulitplied by 100

in 10 and 100 one zero gets cut

x(x-9000)10

x=10x-90000

-9x= -90000

- And - = +

so x=10000

10000 CP

now

profit=5%

gain%=(SP-CP upon CP) ×100

5 (x^1-10000 upon 10000)x100

2 0's of 10000 in denominator and zeroes of 100 will be cut

500=x^1-10000

x^1=10500 rupees

pls mark me brailiest.