If 35 laborer’s dig 805 cubic meters of earth in 5 hrs, how much of the earth will 30 laborer’s dig in 6 hours?

  1. 726 m3
  2. 828 m3
  3. 869 m3
  4. 1127 m3

Solution:

35 Laborers ⇒ 5hrs (for 805 cubic meters earth)

30 Laboureres ⇒ x

By Cross multiplication 30*5 = 35*x ⇒x=30/7 hrs

805 cubic meters ⇒ 30/7 hrs (for 30 labourers)

y cubic meters ⇒ 6hrs

805*6 = (30/7)*y

⇒ y = 805*6*(7/30)

 

⇒ y = 1127 cubic meters

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