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A student skipped a step when he tried to convert 720 seconds into hours, and he got the following incorrect result:720 seconds(1 hour60 minutes)=12 hours720 seconds( 60 minutes1 hour​ )=12 hoursWhat conversion ratio did he skip in this multiple-step conversion?

Question

A student skipped a step when he tried to convert 720 seconds into hours, and he got the following incorrect result:720 seconds(1 hour60 minutes)=12 hours720 seconds( 60 minutes1 hour​ )=12 hoursWhat conversion ratio did he skip in this multiple-step conversion?

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Solution

The student skipped the conversion ratio of 60 seconds to 1 minute. The correct conversion should be:

720 seconds * (1 minute / 60 seconds) * (1 hour / 60 minutes) = 0.2 hours

So, the conversion ratio of 60 seconds to 1 minute was missed in the student's calculation.

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