John loves to swim and can complete 10 laps in 4 minutes. how long would it take him to swim 25 laps?

10 minutes

Step-by-step explanation:

You can use a proportion.

10 laps is to 4 minutes as 25 laps is to x minutes.

10/4 = 25/x

Reduce the left fraction.

5/2 = 25/x

Cross multiply.

5x = 50

x = 10

10 minutes

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