Question

37. 16% pages of a book are read on Monday, 32% pages are read on Tuesday, 325
pages of the book are left to be read. How many pages of the book are read?
a
(1) 300 (2) 400 (3) 275 (4) 280​

Answer 1

Answer:

For Example:

Step-by-step explanation:

Let the total number of pages in the book be x .

Then ,

No. of pages read on Monday = 30% of x

No. of pages read on Tuesday = 50% of x

No. of pages left to be read = 72

Now,

=> Total no. of pages in the book = No. of pages read on Monday + No. of pages read on Tuesday + No. of pages lest to be read .

=> x = (30% of x) + (50% of x) + 72

=> x = (30/100)•x + (50/100)•x + 72

=> x = (3/10)•x + (5/10)•x + 72

=> x = 3x/10 + 5x/10 + 72

=> x = (3x + 5x)/10 + 72

=> x = 8x/10 + 72

=> x - 8x/10 = 72

=> (10x - 8x)/10 = 72

=> 2x/10 = 72

=> x/5 = 72

=> x = 72•5

=> x = 360

Hence,

The total number of pages in the book is 360 .

I have not given exact answer because after this example you do the question it will be helpful than just copying

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Answer 2

300 pages have been read. (Option A is the right answer)

Given,

16% of pages of a book are read on Monday

32% of pages are read on Tuesday

325 pages of the book are left to be read

To Find,

How many pages of the book are read?

Solution,

Let the total number of pages in the book be x

Pages read = 16% of x + 32% of x

Pages read = 16/100 * x + 32/100 * x

Pages read = 16x/100 + 32x/100

Pages read = 48x/100

Pages read = 0.48x

Pages left to read = x - 0.48x

Pages left to read = x(1 - 0.48)

Pages left to read = 0.52x

It has also been given that 325 pages of the book are left to be read.

Therefore,

0.52x = 325

x = $\frac{325}{0.52}$

x = 625 pages

Now, pages already read = 0.48x

Pages read = 0.48(625)

Pages read = 300 pages

Hence, 300 pages have been read.

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