Swimming consumes 500 calories per hour. about how many calories are used in 45 minutes of swimming?

For every 1 hour (=60 min), it consumes = 500 Cal.
So, for 1 min, it is = 500/60 

Now, for 45 min, it would be: 500/60 * 45
= 500/4 * 3 = 1500/4 = 375 

In short, Your Final Answer would be 375 Calories

Hope this helps!