Question

Ex. 7. A watch which gains uniformly, is 6 min, slow at 8 o'clock in the morning
on Sunday and it is 5 min. 48 sec, fast at 8 p.m. on following Sunday. When was it
correct?
Sol. Time from 8 a.m. on Sunday to 8 p.m. on following Sunday = 7 days 12 hours
= 180 hours
54
The watch gains
min. or
min. in 180 hrs.
5
Now
54
5
min. are gained in 180 hrs.
5 min. are gained in
5
180 x
54
*5 hrs. = 83 hrs 20 min. = 3 days 11 hrs 20 min
Watch is correct 3 days 11 hrs 20 min. after 8 a.m. of Sunday.
It will be correct at 20 min. past 7 p.m. on Wednesday.​

Answer 1

Answer:

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