Final answer:
The quantity of milk in the tanker after 10 hours will be 313 liters.
Step-by-step explanation:
To find the quantity of milk in the tanker after 10 hours, we need to determine the total amount of milk that has been decreased over that period of time. The rate of decrease is 9 liters every hour, so after 10 hours, the total decrease will be 9 liters/hour x 10 hours = 90 liters.
To find the quantity of milk in the tanker after 10 hours, we subtract the total decrease from the initial quantity of milk. Initially, the tanker contains 403 liters, so the quantity of milk in the tanker after 10 hours will be 403 liters - 90 liters = 313 liters.
To find the quantity of milk in the tanker after 10 hours, if it decreases at the rate of 9 liters every hour from an initial amount of 403 liters, we can perform a simple arithmetic calculation.
Subtract the total decrease in milk over 10 hours from the initial amount.
Multiply the decreasing rate by the number of hours: 9 liters/hour × 10 hours = 90 liters.
Subtract this total decrease from the initial quantity: 403 liters - 90 liters = 313 liters.
The quantity of milk that will be left in the tanker after 10 hours is 313 liters.