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# Mr. Earl E. Bird gets up every day at 8:00 AM to go to work. If he dri

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Math Expert
Joined: 02 Sep 2009
Posts: 59725
Mr. Earl E. Bird gets up every day at 8:00 AM to go to work. If he dri  [#permalink]

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18 Mar 2019, 03:51
00:00

Difficulty:

45% (medium)

Question Stats:

70% (03:00) correct 30% (02:29) wrong based on 37 sessions

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Mr. Earl E. Bird gets up every day at 8:00 AM to go to work. If he drives at an average speed of 40 miles per hour, he will be late by 3 minutes. If he drives at an average speed of 60 miles per hour, he will be early by 3 minutes. How many miles per hour does Mr. Bird need to drive to get to work exactly on time?

(A) 45
(B) 48
(C) 50
(D) 55
(E) 58

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Joined: 18 Aug 2017
Posts: 5483
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
Re: Mr. Earl E. Bird gets up every day at 8:00 AM to go to work. If he dri  [#permalink]

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18 Mar 2019, 04:00
Bunuel wrote:
Mr. Earl E. Bird gets up every day at 8:00 AM to go to work. If he drives at an average speed of 40 miles per hour, he will be late by 3 minutes. If he drives at an average speed of 60 miles per hour, he will be early by 3 minutes. How many miles per hour does Mr. Bird need to drive to get to work exactly on time?

(A) 45
(B) 48
(C) 50
(D) 55
(E) 58

avg speed = 2*a*b/a+b
2*40*60 /100
IMO B 48
Re: Mr. Earl E. Bird gets up every day at 8:00 AM to go to work. If he dri   [#permalink] 18 Mar 2019, 04:00
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