Question

a man reads 3 8 of a book on a day and 4/5 of the remainder on the second day. If the number of pages still unread are 40, then how many pages did the book contains?

give answer with step-by-step explanation​

Answer 1

Answer:

80 pages

Step-by-step explanation:

let the book contains x pages

the part of book that the man reads in one day= 3/8

so,5/8 of the book remains

he reads 4/5 if the remainder on second day

so, 5/8*4/5= 1/2

1/2 of the book is remaining at last and it is given that 40 pages will remain at last

so 1/2 of x = 40

x= 40*2= 80

hence the book contains 80 pages