Question

A boy read three - eighth of the book on one day and for - fiveth of the remainder on anter day. If there were 30 pages unread,how many pages did the book contain

Answer 1

total pages be x
x-(3x/8)
=5x/8

(4/5)×(5x/8)
=x/2
(3x/8)+(x/2)
=7x/8

x-(7x/8)
=x/8

x/8=30
x=8×30
x=240

Answer 2

Answer:

Let the total pages be 'x' in number.

According to condition 1:

3/8*x read on first day.

So remaining pages will be :

1-3/8*x

=5/8*x

According to condition 2:

Read 4/5 of remaining

So left unread =1/5 of remaining

Therefore remaining at last=1/5 * 5/8*x

=1/8x

Unread=30

Therefore:1/8*x = 30

>> X=240.

Therefore total page is240

Step-by-step explanation:

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