Two types of tea costing $ 180 per kg and $ 280 per kg should

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Two types of tea costing $ 180 per kg and $ 280 per kg should be mixed in the ratio so that the mixture obtained, sold at $ 320 per kg to earn a profit of 20% is

Given , S.P. of two types tea a profit of 20% = $ 320 per kg

∴ C.P. of mixture =	320 × 100
	120

C.P. of mixture = Rs.	800	per kg.
	3

By rule of alligation ,

∴ Required ratio =		40	:	260	= 2 : 13
		3		3