A clock was set right at 4 AM on 15 May 2017. It loses 20 seconds every hour. What time (in AM) will the clock show on 16 May 2017 at 4 AM?
Show answer & explanation
Correct answer: B
Explanation
Total time = From 4:00 PM on May 15 to 4:00 PM on May 16 = 24 hours
Total lag:
Per hour = 20 seconds slow
So, in 24 hours:
24 × 20 = 480 seconds
480 seconds = 8 minutes
Since the clock is running slow, it will lag behind by 8 minutes.
Actual time = 4:00 PM
The clock will show = 4:00 PM − 8 minutes = 3:52 PM
Final Answer: (B) 3:52