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GRE Prep Club Team Member
Joined: 20 Feb 2017
Posts: 2506
Given Kudos: 1053
GPA: 3.39
Janice left her home at 11 a.m., traveling along Route 1 at
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23 Mar 2020, 00:07
23 Mar 2020, 00:07
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Janice left her home at 11 a.m., traveling along Route 1 at 30 mph. At 1 p.m., her brother Richard left home and started after her on the same road at 45 mph. At what time did Richard catch up to Janice?
(A) 2:45 p.m.
(B) 3:00 p.m.
(C) 3:30 p.m.
(D) 4:15 p.m.
(E) 5:00 p.m.
(A) 2:45 p.m.
(B) 3:00 p.m.
(C) 3:30 p.m.
(D) 4:15 p.m.
(E) 5:00 p.m.
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Re: Janice left her home at 11 a.m., traveling along Route 1 at
[#permalink]
12 Feb 2021, 11:51
12 Feb 2021, 11:51
2
Use the concept of Relative Velocity
At 1:00 PM
Janice must have covered 60 miles in 2 hours ...... (from 11:00 AM to 1:00 PM at a speed of 30 mph)
Her brother starts chasing her at 45 - 30 = 15 mph
So, \(time required = \frac{60}{15} = 4 hours\)
Add 4 hours to 1:00 PM, that will be 5:00 PM
Hence, option E
At 1:00 PM
Janice must have covered 60 miles in 2 hours ...... (from 11:00 AM to 1:00 PM at a speed of 30 mph)
Her brother starts chasing her at 45 - 30 = 15 mph
So, \(time required = \frac{60}{15} = 4 hours\)
Add 4 hours to 1:00 PM, that will be 5:00 PM
Hence, option E
Re: Janice left her home at 11 a.m., traveling along Route 1 at
[#permalink]
21 Jun 2022, 19:47
21 Jun 2022, 19:47
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Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
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