Question

If a boy sells book for RS. 450 he gets a loss 10% then find cost price to gain 10% what should be the selling price?​

Answer 1

Answer:

cp = 500

sp = 550

Step-by-step explanation:

let cp = y

loss = 10% of y

       = (10/100) x y

      = 1y/10

      = y/10

cp = sp + loss

y  = 450 + y/10

y - y/10 = 450

9y/10 = 450

9y = 450 x 10

y= 4500/9

y = 500

therefore CP is rupee 500

for gaining 10%

cp = 500

g = 10% of cp

= (10/100) x 500

= 50

sp = ?

sp = cp + gain

sp = 500 + 50

sp = 550

therefore to gain 10% the sp should be rupee 550