Sudhir can copy 40 pages in 8 hours; Sudhir and Prakash together can copy 350 pages in 35 hours. In how much time can Prakash copy 40 pages?
Show answer & explanation
Correct answer: C
Explanation
Given:
Sudhir: 40 books in 8 hours
Sudhir + Prakash: 350 books in 35 hours
Sudhir's rate = 40 / 8 = 5 books/hour
Sudhir + Prakash's rate = 350 / 35 = 10 books/hour
Prakash's rate = 10 − 5 = 5 books/hour
Time required for 40 books = 40 / 5 = 8 hours