On increasing the number of lines in a page by 80, they become 240. What is the % of increase in the no. of lines in the page?	Choose the correct choice from the following: A) 20 % B) 305 C) 50 % D) 55 % E) 60 %

Rationale: explanation : number of pages increased = 80 now , the number of pages of book = 240 number of pages of the books before increase = 240 – 80 = 160 % increase in the number of pages in the book = 80 160 x 100 % = 50 % c
Answer: C