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The elapsed time would be 18 minutes
Elapsed time
50 minutes elapse between 11:35 and 12:25
7:32 1:58 ------ 9:30 pm ------ Do the addition as if it were decimal addition but you should realize that 60 minutes make an hour (not 100).
Protocol-ARequires any common timekeeping device.Must run at the proper rate, but need not becalibrated or synchronized to anything.-- At the beginning of the run, note the time, and write it down.-- At the end of the run, note the time, and write it down.-- Take the data to a cool, dry, well-lighted, quiet place,whereit may be processed accurately, in peace, without distractions.-- Subtract the first-noted time from the last-noted time.The difference is the elapsed time during the run.===========================Protocol-B, if the required equipment is available.Requires a resettable stopwatch.-- Reset the stopwatch to zero.-- Just as the run begins, start the stopwatch.-- Just as the run ends, stop the stopwatch.-- Read the time elapsed during the run, directly from the stopwatch display.