Find the ratio in which rice at Rs. 7.20 a kg be mixed with rice at Rs. 5.70 a kg to produce a mixture worth Rs. 6.30 a kg.

Q: Find the ratio in which rice at Rs. 7.20 a kg be mixed with rice at Rs. 5.70 a kg to produce a mixture worth Rs. 6.30 a kg.

By the rule of alligation: Cost of 1 kg of 1st kind Cost of 1 kg of 2nd kind 720 p Mean Price 630 p 570 p 60 90 ∴ Required ratio = 60 : 90 = 2 : 3.

1 : 3
2 : 3
3 : 4
4 : 5

Correct Answer: 2 : 3

Explanation:

By the rule of alligation:

Cost of 1 kg of 1^st kind Cost of 1 kg of 2^nd kind
720 p	Mean Price 630 p	570 p
60		90

∴ Required ratio = 60 : 90 = 2 : 3.

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