Question

A company sells crushed rock in 16-pound bags each bag containing a mixture of quartz to marble is the same for every bag. If 3 bags of crushed rock containa total of 27 pounds of quartz and 21 pounds of marble, how many bags contain 72 pounds of quartz and 52 pounds of marble

Answer 1

8 bags.

Explanation:

Each bag will contain 27/3 = 9 pounds of quartz and 21/3 = 7 pounds of marble.

So there are 72/ 9 = 8 bags which contain 72 pounds of quartz. They will contain 56 pounds of marble, not 52 pounds.