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How many seconds are there in $24$ hours?
Given: $24\ hours$.
To do: To find the number of seconds in $24$ hours.
Solution:
As known $1\ hour=60\ minutes$
And $1\ minute=60\ seconds$
Therefore, $1\ hour=60\times60\ seconds=3600\ seconds$
$\Rightarrow 24\ hours=3600\times24=86400\ seconds$
Thus, there are $86400\ seconds$ in $24\ hours$.
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