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Title: If 35 digging machines dig 805 cubic metres of earth in 5 hours, how much earth will 30 digging ... Post by: Lada on Nov 26, 2017 If 35 digging machines dig 805 cubic metres of earth in 5 hours, how much earth will 30 digging machine dig in 6 hours?
Title: Re: If 35 digging machines dig 805 cubic metres of earth in 5 hours, how much earth will 30 digging ... Post by: yacom on Nov 26, 2017 Number of digging machines is directly proportional to amount of earth dug.
Time is also directly proportional to the amount of earth dug. ∴ = × ⇒ x = 828 30 digging machines will dig 828 cubic metres of earth in 6 hours. |