Question

While you are doing heavy work, your heart pumps up to 25.0 L of blood per minute. Your muscles get about 80% by volume of your blood under these conditions. What volume of blood in quarts is pumped through your muscles in 107 minutes of work that causes your heart to pump 20.7 L per minute, 79.49% of which goes to your muscles?

Answer 1

I see math here; not much chemistry.
20.7 L/min x 107 min x 0.7949 = ?L.
Convert L to quarts. 1.0 L = 1.057 quarts.