Thirty persons working 6 hours a day can complete a work in 28 days. How many days will 28 persons take to complete another work, which is two times the present work, if they work 9 hours a day?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 40.
(M1 × D1 × T1)/W1 = (M2 × D2 × T2)/W2
⇒ (30 × 28 × 6)/1 = (28 × D2 × 9)/2
⇒ D2 = 5040/126 = 40 days