If 90 men can do a certain job in 16 days, working 12 hours

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If 90 men can do a certain job in 16 days, working 12 hours per day, then the part of that work which can be completed by 70 men in 24 days, working 8 hours per day is

Using Rule 1

	M₁D₁T₁	=	M₂D₂T₂
	W₁		W₂

	90 × 16 × 8	=	70 × 24 × 8
	1		W₂

⇒ W₂ =	70 × 24 × 8	=	7
	90 × 16 × 8		9