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Mathematics, 17.10.2019 02:30 MK100
Gunpowder can be prepared by saltpetre and nitrous oxide. price of saltpetre is thrice the price of nitrous oxide. notorious gangster pitbull sells the gunpowder at $2160 per 10 g, thereby making a profit of 20% . if the ratio of saltpetre and nitrous oxide in the mixture be 2: 3, find the cost price of saltpetre.
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