Question

Reemu read 1/5th pages of a book. If she reads further 40 pages, she would have read 7/10th pages of the book. How many pages are left to be read?

Answer 1

Let total pages be x
ATQ,
(x/5)+40=7x/10
(x+200)/5=7x/10
Cross multiply
10x+2000=35x
10x-35x=-2000
-25x=-2000
x=2000/25
x=80 pages
Therefore pages left= 3/10 of pages
=3*80/10=24 pages
Plz mark as brainliest :D

Answer 2

Let us assume the total number of pages$= x$

Number of pages Reemu read $= (1/5)x$

Now let us examine the situation

$(1/5)x + 40 = (7/10) x$

$= (7/10)x - (1/5)x = 40$

$=[(7 - 2)/10]x = 40$

$x = (40 \times 10)/5 = 80$

$1/5 \times 80 = 16$

$7/10 \times 80 = 56$

Total number of pages left to be read$= 80 - 56 = 24$

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