14 pumps working 8 hours a day can empty a completely filled reservoir in 18 days. How many such pumps working 12 hours a day will empty the same reservoir in 4 days?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 42.
Given:
14 pumps working 8 hours a day can empty a completely filled reservoir in 18 days.
Concept Used:
M1 × D1 × H1 = M2 × D2 × H2
Here, M = Mens, D = days, H = hours
Explanation:
Let the required pimps be P
⇒ 14 × 18 × 8 = P × 4 × 12
⇒ P = (14 × 18 × 8)/(4 × 12)
⇒ P = 14 × 3
⇒ P = 42