Ans :
90 minutes, the sloth may move 600 units .
Given :
250*5/8 = 250 × (8/5) = 400
Hour :
a period of time equal to the twenty-fourth part of a day and night and divided into 60 minutes.
1 hour = 60 minute
Slot :
a long, narrow aperture or slit in a machine for something to be inserted.
sloth may move 400 units per hour.
a sloth may move in 400 units = 60 minutes.
A slot of 200 units = 30 minutes.
Therefore,
it will move (400 + 200) units = (60 + 30) minutes.
Hence,
in 90 minutes, the sloth may move 600 units.
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