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.

Question

anonymous · Answer

Take it as :
Price of saltpetre is thrice the price of nitrous oxide 
           |                                                     |
          $ x                                                 $y 

x = 3y 

Correct !