Sujit can do a piece of work in 4 days, and Rakesh can do it in 8 days. If they work together for 2 days, how much of the work will be left?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 25%.
Sujit's work rate = 1/4
Rakesh's work rate = 1/8
Together complete in 1 day = 1/4 + 1/8 = 3/8
Sujit and Rakesh's 2 days work = 2 × (3/8) = 3/4
Work left = 1 – 3/4 = 1/4
Percentage of work left = (1/4) × 100% = 25%