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# A car travelled 75% of the way from town X to town Y at a

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Senior Manager
Joined: 17 May 2005
Posts: 272
Location: Auckland, New Zealand
Followers: 1

Kudos [?]: 5 [0], given: 0

A car travelled 75% of the way from town X to town Y at a [#permalink]  04 Jun 2005, 14:57
A car travelled 75% of the way from town X to town Y at a constant speed of 50 miles per hour. What average speed was maintained by the car for the remaining journey if the average speed for the entire journey was 40 miles per hour?

A) 25mph
B) 50mph
C) 20mph
D) 37.5mph
E) the data given above is insufficient to calculate the answer
Director
Joined: 07 Jun 2004
Posts: 614
Location: PA
Followers: 3

Kudos [?]: 276 [0], given: 22

none of the abovr but the answer will be 47.05mph
Director
Joined: 18 Apr 2005
Posts: 549
Location: Canuckland
Followers: 1

Kudos [?]: 8 [0], given: 0

Re: Journey [#permalink]  04 Jun 2005, 17:47
cloudz9 wrote:
A car travelled 75% of the way from town X to town Y at a constant speed of 50 miles per hour. What average speed was maintained by the car for the remaining journey if the average speed for the entire journey was 40 miles per hour?

A) 25mph
B) 50mph
C) 20mph
D) 37.5mph
E) the data given above is insufficient to calculate the answer

1/(3/(4*50) + 1/(4*x)) = 40

my guess it should be A) 25
Senior Manager
Joined: 19 Feb 2005
Posts: 487
Location: Milan Italy
Followers: 1

Kudos [?]: 11 [0], given: 0

0.25/x+0.75/50=1/40

25 it is
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