09:30 hours - 02:30 hours = 07:00 hours
Answer: seven hours
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The elapsed time between 4:00 and 1:30 is 9 and 1/2 hours.
9:45
9 hours 5 mins.
1:45 plus 15 minutes gives us 2:00 pm. It is nine hours from 2:00 to 11:00 pm. Then we have 23 more minutes we can add to the first 15 for 38 minutes. 9 hours and 38 minutes is the elapsed time.
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).