Tim D.

asked • 10/19/20

The average human heart pumps about 5 quarts of blood every minute. How much blood does it pump in one day? In one month? [assume a 30 day month]

The average human heart pumps about 5 quarts of blood every minute. How much blood does it pump in one day? In one month? [assume a 30 day month]

Greg S.

First, figure out how many minutes are in a day: -There are 24 hours in a day -There are 60 minutes in an hour -To calculate how many minutes are in day, you set up an equation: 1 hours 24 hours ------------ = -------------- 60 minutes x -Then you cross multiply to get the following equation: 1 hour (x) = 24 hours (60 minutes) -This can be simplified to 1 hour (x) = 1440 hours (minutes) -Isolate 'x' by dividing 1 hour on both sides: 1 hours (x) 1440 hours (minutes) -------------- = ------------------------------ 1 hours 1 hours -The hours cancel out. And dividing any number by 1 yields the number, so you're left with: x = 1440 minutes in a day Next, you calculate how much blood it pumps in a day? -Known: The heart pumps 5 quarts a minute -Now that we know how many minutes are in a day, we can set up another equation: 1 minutes 1440 minutes --------------- = --------------------- 5 quarts x -Cross multiply like above: 1 minutes (x) = 1440 minutes (5 quarts) -This yields: 1 minutes (x) = 7200 minutes (quarts) -Divide both sides by minutes 1 minutes (x) 7200 minutes (quarts) ------------------- = ---------------------------------- 1 minutes 1 minutes -The hours cancel out. And dividing any number by 1 yields the number, so you're left with: x = 7200 quarts in a day How much blood does it pump in a month? -There are 30 days in a month (as we're told in the question) -There are 7200 quarts pumped in a day, we can set up another equation: 1 days 30 days --------------- = --------------------- 7200 quarts x -Cross multiply like above: 1 days (x) = 7200 quarts (30 days) -This yields: 1 days (x) = 216,000 quarts (days) -Divide both sides by days 1 days (x) 216,000 quarts (days) ------------------- = ---------------------------------- 1 days (x) 1 days -The days cancel out. And dividing any number by 1 yields the number, so you're left with: x = 216,000 quarts in a month Therefore, the answer to the original question is: -The heart pumps 7200 quarts in a day -The heart pumps 216,000 quarts in a 30-day month
Report

10/20/20

Greg S.

Argh! The formatting here stinks!
Report

10/20/20

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