- A25 min fast
- B12 min fast
- C15 min fast
- D15 min slow
Step-by-Step Solution
13:20 is 1:20 p.m. The corridor clock shows 1:35, which is 15 minutes ahead: it is 15 min fast.
Answer: C) 15 min fast
A hospital's digital board (24-hour, always correct) hangs beside the corridor clock, as shown. How far out is the corridor clock?
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