Anu's math text book has 360 pages. The chapter Lines and Angles covers pages from 18 upto 72. What is the ratio of the number of pages of this chapter to the total number of pages in the book?
The correct option is A 3:20
Given: Total number of pages in the math text book = 360
The chapter Lines covers from page 18 to 72.
Hence, this chapter runs through 54 pages (72-18 =54)
Ratio of number of pages of this chapter to the total number of pages in the book = 54: 360, which is equivalent to 3:20
(taking 18 as common factor)