11:30 and 1:00
assuming that it is
11:30 AM to 1:00 PM and not 11:30 AM to 1:00 AM
11:30 to 1:00 cannot be directly counted
the hours go like this
1,2,3,4,5,6,7,8,9,10,11,12=AM
then after 12AM then
1,2,3,4,5,6,7,8,9,10,11,2=PM
60 minutes in 1 hour so
11:30=11 hours and 30 mins
how far to 12 AM?
12 AM=12 hours=11 hours and 60 minutes
11 hours and 60 minutes-(11 hours and 30 mins)=30 minutes
then from 12 AM to 1 PM=1 hour so
time total difference is 1 hour and 30 minutes
51cm / 3 X 5 = 85cm
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Find the unit completion rate:
217 problems
--------------------- = 14.47 problems per minute, or approx 14 problems/min.
15 minutes