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Explanation:
Given Distance at 8:30am = 57321km
At 8:50 am distance = 57336Km
Distance covered = distance at 8:50- distance at 8:30
= 57336-57321
=15 km
Time will be difference of the time 8:50 and 8:30 = 20 min
So speed = distance / time
= 15/20= 3/4 or 0.75km/min
to find in km/h we have to convert given time into hour
we know that 1 hour = 60 min so 1 min = 1/60 hour
and 20 min = 20×1/60 = 1/3 hr
speed = 15/1/3= 15×3= 45km/hr
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