2.28 tons of gasoline was poured into the tank through two pipes. Through the first pipe, 3.6 tons

2.28 tons of gasoline was poured into the tank through two pipes. Through the first pipe, 3.6 tons of gasoline per hour entered, and it was opened for 0.4 hours. Through the second pipe, 0.8 tons less gasoline came in an hour than through the first. How long was the second pipe open.

1. Determine the amount of gasoline that entered the tank through the first pipe:

3.6 x 0.4 = 1.44 t;

2. Determine the amount of gasoline that entered the tank through the second pipe:

2.28 – 1.44 = 0.84 t;

3. Determine the rate of entry of gasoline through the second pipe:

3.6 – 0.8 = 2.8 t / h;

4. Determine how long the second pipe was open:

0.84: 2.8 = 0.3 h.

Answer: The second pipe was opened for 0.3 hours.