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Question
A clock gains 4 mins every hour. If the clock is set accurately at 4:00 am, then what will be the time after 4 hours?
A clock gains 4 mins every hour. If the clock is set accurately at 4:00 am, then what will be the time after 4 hours?
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Solution
The correct option is A 8:16 am
The clock is set accurately at 4:00 am.
Since the clock gains 4 mins every hour, in four hours it will gain 4 × 4 minutes = 16 mins.
Time after 4 hours (if the clock was running accurately) = 8:00 am
Because, it has gained 16 mins in past 4 hours, the time on the face of the clock will be 8:16 am.
The clock is set accurately at 4:00 am.
Since the clock gains 4 mins every hour, in four hours it will gain 4 × 4 minutes = 16 mins.
Time after 4 hours (if the clock was running accurately) = 8:00 am
Because, it has gained 16 mins in past 4 hours, the time on the face of the clock will be 8:16 am.
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