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### Discussion :: Clock

1.  A watch which gains uniformly is 2 minutes low at noon on Monday and is 4 min. 48 sec fast at 2 p.m. on the following Monday. When was it correct?
2.  A. 2 p.m. on Tuesday B. 2 p.m. on Wednesday C. 3 p.m. on Thursday D. 1 p.m. on Friday

Explanation :

Time from 12 p.m. on Monday to 2 p.m. on the following Monday = 7 days 2 hours = 170 hours.

The watch gains[2+4$$\frac { 4 } { 5 }$$]min.or $$\frac { 34 } { 5 }$$min. in 170 hrs

Now,$$\frac { 34 } { 5 }$$ min are gained in 170 hrs.

2 min. are gained in[170x$$\frac { 5} { 34 }$$x2]hrs=50hrs

Watch is correct 2 days 2 hrs. after 12 p.m. on Monday i.e., it will be correct at 2 p.m. on Wednesday.

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