Question

A book seller earns 12% profit on selling 100 notebooks for Rs.5250 . At what price had he bought each notebook?

Answer 1

Answer:

Ans. = ₹ 46.88 ( approx.)

Step-by-step explanation:

Let the CP of 100 notebooks be ₹ x

A/q 12% of x + x = 5250

=> 12x / 100 + x = 5250

=> (12x + 100x)/100 = 5250

=> 112x/100 = 5250

=> 112x = 5250 × 100

=> 112x = 525000

=> x = 525000/112

= ₹ 4687.5

Now ,

CP of 100 notebooks = ₹ 4687.5

CP of 1 notebook = 4687.5/100

= ₹ 46.875

= ₹ 46.88 ( approx. )

Hence , each book had been bought at ₹ 46.88 .

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Answer 2

12% of 5250=12/100×5250

=630

we know,

he gains 12%profit.

therefore,

cost of 100 books=price - amount of profit

=5250-630

=4620

cost of one book=4620/100

=46.2

thus ,the book seller bought one book at the price of 46.2rs