Um negociante comprou 8 barricas de vinho todas com a mesma capacidade tendo pago R$7,00 o litro é vendido a R$9,00 ele ganhou ao todo R$1,260,00 qual era a capacidade de cada barrica?

each barrel has a capacity of 78,75 liters

Step-by-step explanation:

since the sold 8 barrels and assuming that each have the same capacity and are sold to the same price, the total amount he earned is

total earnings = number of barrels * number of liters / barrel * earnings/liter

R$1,260,00 = 8 barrels * number of liters / barrel * (R$9,00 - $7,00) / liter

number of liters / barrel = R$1,260,00 / (8 barrels*R$2,00 / liter) = 78,75 liters/barrel

therefore each barrel has a capacity of 78,75 liters