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Question

A watch gains 8 minutes every 24 hour. The clock was adjusted to show the exact time at 10 a.m. on a monday. When the watch shows the time 10:40 a.m. on saturday, what is the correct time?

A
10 a.m.
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B
9:40 a.m.
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C
10:10 a.m.
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D
None of the above
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Solution

The correct option is A 10 a.m.

24 hours in a standard clock is 24 hours and 8 minutes in the given clock.

1440 minutes in standard clock 1448 minutes in the given clock.

So, 1 minute in standard clock 14481440=181180minutes

From 10 a.m. Monday to 10: 40 a.m. Saturday 120 hours and 40 minutes =7240 minutes in the given clock.

In standard clock, this will correspond to =7240×180181=7200minutes or 120 hours.

So, the actual time will be at 10 a.m. on Saturday.


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