Question

Mina ask a shopkeeper about the amount of a book .
As the shopkeeper was busy so he said the amount of 10 notebooks are 80 rupees so do something to find the amount of 1 note book


As after solving she got the amount ?
As shopkeeper said now u want 3 notebooks so you solve again


So can you all solve
ans of 3 notebooks are ?​

Answer 1

Correct answer:-

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Class 10

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>>A shopkeeper buys a number of books for

Question

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A shopkeeper buys a number of books for Rs. 80. If he had bought 4 more for the same amount each book would have cost Rs. 1 less. How many books did he buy?

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Solution

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Correct option is B)

Let the shopkeeper buy x number of books.

According to the given condition cost of x books =Rs80

Therefore cost of each book =

x

80

Again when he had brought 4 more books

Then total books in this case =x+4

So cost of each book in this case =

x+4

80

According to Question,

x

80

−

x+4

80

=1

x(x+4)

80(x+4)−80x

=1

x

2

+20x−16x−320=0

(x−16)(x+20)=0

x=16orx=−20

Hence the shopkeeper brought 16 books

hope it helps ♡

#MichAditi✨✌️

Answer 2

Answer:

Cost of the book = Rs. 35.65

Money given to shopkeeper = Rs. 50

Money to be returned by shopkeeper = Rs. 50 - Rs. 35.65

Hence, Raju gets Rs. 14.35 back from the shopkeeper.