Postal or Sorting Assistants Model Paper 9 With Solutions

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Question : 23 of 100

Marks: +1, -0

If 3 pumps can empty a tank in 2 days by working 8 hours a day, then how many hours a day must 4 pumps work to empty the tank in one day?

12 hours
15 horns
18 hours
9 hours

Solution:

M_1D_1T_1=M_2D_2T_2

⇒

3 × 2 × 8 = 4 × 1×T_2

⇒

T_2={3×2×8}/4=12

hours

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