If 6 persons working 8 hours a day earn ₹ 8400 per week,

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If 6 persons working 8 hours a day earn ₹ 8400 per week, then 9 persons working 6 hours a day will earn per week

	More persons, more earning		Direct proportion x
	Less working hours, less earning

∴	6 : 9		: : 8400 : x
	8 : 6

∴ 6 × 8 × x = 9 × 6 × 8400

or x =	9 × 6 × 8400	= ₹ 9450
	6 × 8

Aliter : Using Rule 1,
Here, M₁ = 6, T₁ = 8, wages = x
M₂ = 9, T₂ = 6, wages = 8400
6 × 8 × x = 9 × 6 × 8400

x =	9 × 6 × 8400	= Rs 9450
	6 × 8