4.25 hours (60 minutes/1 hour)
= 255 minutes
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To work thi out, first note that there are 60 minutes in an hour. This means that to convert from hours into minutes you have to multiply by 60. In this case we have 425 hours, so do: 425 x 60 = 25,500 Therefore there are 25,500 minutes in 425 hours.
Eight hours exactly !
180
425-32=393, then 393/1.8=218.33oC
180 min.