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2015-05-22T19:20:24+08:00

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We just multiply 2 by 20 and we get 40, this would mean that he practiced 40 hours.

We convert 40 hours to days and hours and we get 1 day and 16 hours.
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2015-05-22T19:31:08+08:00

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2 hours for 20 days:
2 hours:1 day

convert(in hours):
20 days(\frac{2 hours}{1 day})=40 hours

He practiced swimming for 40 hours per 20 days.

convert(in days):
[tex]40 hours(\frac{1 day}{24 hours})=1.67 days

In mixture
.67 x 24=16

=1 day and 16 hours

Hope this helps =)
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