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Standard VI

Mathematics

12 Hours and 24 Hours Format

There are two...

Question

There are two clocks, both set to show correct time at 9:00 a.m. One clock loses 1 minute every hour, and the other gains 1 minute every hour. By how many minutes do they differ at 10:00 p.m. on the same day?

24 minutes

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30 minutes

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28 minutes

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26 minutes

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13 minutes

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Solution

The correct option is B 26 minutes
After each hour, the difference between clocks will increase by 2 minutes.
At 10 p.m., hours passed=13,
Difference=13*2=26 minutes.

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There are two clocks, both set to show correct time at 9:00 a.m. One clock loses 1 minute every hour, and the other gains 1 minute every hour. By how many minutes do they differ at 10:00 p.m. on the same day?

The correct option is B 26 minutesAfter each hour, the difference between clocks will increase by 2 minutes.At 10 p.m., hours passed=13,Difference=13*2=26 minutes.

The correct option is B 26 minutes
After each hour, the difference between clocks will increase by 2 minutes.
At 10 p.m., hours passed=13,
Difference=13*2=26 minutes.