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Question

A Watch Which Gains Uniformly is5min, Slow At 8 O'clock In The Morning On Sunday And It Is 5Min48Sec. Fast At 8 p.m. On Following Sunday. When Was It Correct?


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Solution

Time from 8 a.m on Sunday to 8 p.m on the following Sunday =7days12hours=180hours

Therefore, the watch gains 554minin 180hours

Now, 554min are gained in 180hours

Therefore, 5min are gained in (180×554×5)hrs.=83hrs20min.

=3days11hrs20min.

Therefore, the watch is correct 3days11hrs20min. after 8a.m. on Sunday

Therefore, it will be correct at 20minpast7p.m. on Wednesday


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