Question

5. A hawker gains the selling price of 4 ball-point pens on selling 1 dozen pens. What is his gain percentage?
8. A man sold a book at a loss of 20%. If he had sold the book for ₹12 more, he would have gained 10%.Find the cost price of the book.​

Answer 1

hope it helps uh

Step-by-step explanation:

5 ) profit is sp(selling price) -cp(cost price)

12(sp-cp)=4sp

8sp=12cp

sp/cp=12/8

profit percentage is( (sp-cp)/cp )100

or (sp/cp -1)100

(12/8 -1)100

(4/8)100

Ans 50%

8) Answer

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bhagyashreechowdhury

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Given:

A man sold a book at a loss of 20%

If he had sold the book for Rs. 12 more then he would have gained 10%

To find:

The cost price of the book

Solution:

Let "x" represent the cost price of the book.

The formula used to calculate the S.P. is as follows:

So, by using the formula, we get

The S.P. of the book =  

Now, if the man had sold the book for Rs. 12 more then he would have made a profit of 10%, so accordingly we can form an equation as,

Thus, the cost price of the book is Rs. 40.