Find the value of $7\frac{1}{2}$ hours + 8 hours 45 minutes + 5.25 hours.... | Measurement: Metric Units, Time, and Calendar Q&A

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Find the value of $7\frac{1}{2}$ hours + 8 hours 45 minutes + 5.25 hours.

Options

21 hours 00 minutes

21 hours 20 minutes

20 hours 30 minutes

21 hours 30 minutes