A watch which gains uniformly, is 6 min. slow at 8 o'clock in the morning Sunday and it is 6 min. 48 sec. fast at 8 p.m. on following Sunday. When was it correct? ( A ) 20 min past 7pm on friday ( B ) 20 min past 7pm on tuesday ( C ) 20 min past 7pm on thursday ( D ) 20 min past 7pm on wednesday
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option (A)20 min is correct........
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options (D)...........
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