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GRE Prep Club Team Member
Joined: 20 Feb 2017
Posts: 2932
Given Kudos: 1283
GPA: 3.39
Pat's watch gains an extra 10 seconds every 2 hours. Kim's watch loses
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22 Dec 2022, 06:43
22 Dec 2022, 06:43
1
Expert Reply
00:00
Question Stats:
75% (01:57) correct
25% (01:18) wrong based on 4 sessions
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Pat's watch gains an extra 10 seconds every 2 hours. Kim's watch loses 5 seconds every 3 hours. If both watches are set to correct time at 8 o'clock in the morning and run without interruption, after 72 hours, what will be the difference in time between Pat's watch and Kim's watch?
(A) 4 min
(B) 6 min
(C) 6 min 40 sec
(D) 7 min 30 sec
(E) 8 min
(A) 4 min
(B) 6 min
(C) 6 min 40 sec
(D) 7 min 30 sec
(E) 8 min
Re: Pat's watch gains an extra 10 seconds every 2 hours. Kim's watch loses
[#permalink]
23 Dec 2022, 04:26
23 Dec 2022, 04:26
What the answers? Option A?
Re: Pat's watch gains an extra 10 seconds every 2 hours. Kim's watch loses
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23 Dec 2022, 04:49
23 Dec 2022, 04:49
Expert Reply
In 72 hours Pat's watch will gain an extra 72/2*10 = 360 seconds.
In 72 hours Kim's watch will lose 72/3*5 = 120 seconds.
Hence the difference will be 360 + 120 = 480 seconds or 8 minutes.
Answer: E.
Hope it helps.
In 72 hours Kim's watch will lose 72/3*5 = 120 seconds.
Hence the difference will be 360 + 120 = 480 seconds or 8 minutes.
Answer: E.
Hope it helps.
