Question

a student buy a pen for rs 90 and sells if for rs 100 .find the his gain and gain percentage

Answer 1

Given:

Cost Price of the Pen The Student Buys It For (C.P) = Rs. 90

Selling Price The Price The Boy Sold The Pen For (S.P) = Rs. 100

To Find:

Gain and Gain Percentage.

Calculating:

The Formula That We Use To Find Gain:

Selling Price - Cost Price

Substituting the values given to us in this formula we get:

= 100 - 90

= Rs. 10

Therefore, the gain the student made is of 10 Rupees.

Now, we have to find the gain percentage.

Formula that is used to find the gain percentage:

Gain Percentage = Gain / Cost Price x 100

Substituting all the values known to us in this formula we get:

= 10/90 x 100

= 1 x 100 / 9

= 100 / 9

= 11.12%

Therefore, the Gain Percentage that the student made is 11.12 %.

Answer 2

Answer:

=> The value of gain is Rs. $10$ and the gain percentage is $11.11\%$.

Step-by-step explanation:

Given that:-

For student :

The cost price of the pen = Rs. $90$

The selling price of the pen = Rs. $100$

Since, SP $>$ CP.

For calculating, the gain we have to use the formula:

Gain = $SP -CP$

        = $100 - 90$

        = Rs. $10$

Now, for calculating the gain percentage:

$Gain\%=\frac{gain}{CP}\times 100$

           $=\frac{10}{90} \times 100$

           = $11.11\%$

Hence, the required gain is Rs. $10$ and gain percentage is $11.11\%$.