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?
Choose the most appropriate option:
A) 2 p.m. on Tuesday	B) 2 p.m. on Wednesday	C) 3 p.m. on Thursday	D) 1 p.m. on Friday	E) None of these
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 + 44⁄5) min.   or 34⁄5 min. in 170 hrs.   Now, 34⁄5 min. are gained in 170 hrs.   ∴ 2 min. are gained in (170 × 5⁄34 × 2)hrs. = 50 hrs   ∴ 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.   Answer 2 p.m. on Wednesday
<result>B</result>
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?