Lupert lemon started his two watches at the same time. one is slow and loses two minutes every hour; the other one is fast and gains one minute every hour. how long will it take for thr faster watch to br one hour ahead of the slower watch

20 hours

Step-by-step explanation:

Since, One watch is slow and loses two minutes every hour

⇒ 1 hour of slow watch = 62 minutes

And, the other one is fast and gains one minute every hour.

⇒ 1 hour of fast watch = 59 minutes,

Hence, in 1 hour, the difference between slow and fast watch in 1 hour = 62 - 59 = 3 minutes.

⇒ The between slow and fast watch in 20 hours = 20 × 3 = 60 minutes or 1 hour.

Hence, after 20 hours the difference between the watches will be 1 hours.