Multiple choice

Three boys solve a question in 8/9 hr. First boy and second boy solves 1/3th part and 1/6th part of the problem in 1/6 hr and 2/3 hr respectively. What is the fraction of the problem and the time left for the third student to solve the complete question?

  1. 1/2th part, 1/18 hr

  2. 1/3th part, 1/36 hr

  3. 1/4th part, 1/9 hr

  4. 1/7th part, 1/27 hr

  5. None of these

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

1/2 + 1/3 + 1/6 = 1 also (1/18 + 2/3 + 1/6) h = 8/9 hr. This is correct.