It doesn't matter what the price of oil or vinegar.
Since the customer bought the same dollar amount of vinegar and oil, and the vinegar costs twice as much as the oil, the number of gallons of vinegar and the number of gallons of oil must be in the ratio 2 / 1.
Barrels of vinegar twice as much as oil is:
17 + 31 + 8 = 56
This is twice as much as a barrel of oil:
13 + 15 = 28
The sold barrels are:
8 ,13 , 15 , 17 , 31
The unsold barrel is 19 gallon.
There are six barrels, containing 15 gallons, 8 gallons, 17 gallons, 13
gallons, 19 gallons, and 31 gallons. Each barrel contains either oil or
vinegar. The oil sells for twice as much per gallon as the vinegar. A customer
buys $14 worth of each, leaving one barrel. Which barrel was left?
1 answer
1 answer