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A clock shows the time as 6 am. If the minute hand gains 2 minutes every hour, then how many minutes will the clock gain by 9 pm?  
  • a)
    10 minutes
  • b)
    15 minutes
  • c)
    20 minutes
  • d)
    30 minutes
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
A clock shows the time as 6 am. If the minute hand gains 2 minutes eve...
To solve this problem, we need to determine how many minutes the clock gains from 6 am to 9 pm.

- We know that the clock gains 2 minutes every hour.

Calculating the total minutes gained from 6 am to 12 pm:

- From 6 am to 7 am, the clock gains 2 minutes.
- From 7 am to 8 am, the clock gains another 2 minutes.
- This pattern continues until 12 pm.

So, the clock gains 2 minutes every hour for 6 hours, resulting in a total of 2 x 6 = 12 minutes gained by 12 pm.

Calculating the total minutes gained from 12 pm to 9 pm:

- From 12 pm to 1 pm, the clock gains 2 minutes.
- From 1 pm to 2 pm, the clock gains another 2 minutes.
- This pattern continues until 9 pm.

So, the clock gains 2 minutes every hour for 9 hours, resulting in a total of 2 x 9 = 18 minutes gained by 9 pm.

To find the total minutes gained from 6 am to 9 pm, we add the minutes gained from 6 am to 12 pm (12 minutes) to the minutes gained from 12 pm to 9 pm (18 minutes):

12 minutes + 18 minutes = 30 minutes

Therefore, the clock gains 30 minutes from 6 am to 9 pm. Hence, the correct answer is option D) 30 minutes.
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A clock shows the time as 6 am. If the minute hand gains 2 minutes every hour, then how many minutes will the clock gain by 9 pm?a)10 minutesb)15 minutesc)20 minutesd)30 minutesCorrect answer is option 'D'. Can you explain this answer?
Question Description
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