Question

by selling note book for 22 rupee aA shopkeeper gains 10% the cost price of the book is ​

Answer 1

Solution:

Given,

Final price = Rs. 22

Gain % = 10%

Here,

* CP shows the cost price.

* FP shows the final price.

We know that,

Gain = FP - CP / CP

Gain % = FP - CP / CP × 100

Gain % = 22 - CP / CP × 100

10 = 22 - CP / CP × 100

CP / 22 - CP = 10

CP = 10 ( 22 - CP )

CP = 220 - 10CP

CP + 10CP = 220

CP = 220/11

Therefore, CP = Rs.20