Three persons individually can perform a particular job j in 5, 6 and 7 hours respectively. What is the longest part of the job that can be done in one hour by two persons working together?
A 11/42
B 11/30
C 12/35
D 11/35
Solution
Correct Answer: Option B
অ্যাপ/ওয়েবসাইটে রুটিনভিত্তিক নিয়মিত লাইভ পরীক্ষা হচ্ছে।