If 30 persons take 10 days to complete a certain work by working 8 hours a day, then 40 persons should work how many hours a day so that the work is completed in 6 days?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 10.
M1 × D1 × H1/W1 = M2 × D2 × H2/W2
where,
M = Men
D = Days
H = Hours
W = Work
30 × 10 × 8 = 40 × 6 × H2
⇒ H2 = 2400/240
⇒ H2 = 10
Hence, 10 hours is the answer.