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# Martha biked 18 2/3 miles in 2 hours and 40 minutes. What wa

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Intern
Joined: 12 Apr 2013
Posts: 16
Martha biked 18 2/3 miles in 2 hours and 40 minutes. What wa [#permalink]

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17 May 2013, 08:10
1
KUDOS
00:00

Difficulty:

15% (low)

Question Stats:

74% (02:03) correct 26% (00:54) wrong based on 58 sessions

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Martha biked 18 2/3 miles in 2 hours and 40 minutes. What was her average rate of speed in miles per hour?

A. 7
B. 7 2/3
C. 8 1/3
D. 9
E. 9 1/3
[Reveal] Spoiler: OA
Intern
Joined: 05 Mar 2013
Posts: 45
Location: India
Concentration: Entrepreneurship, Marketing
GMAT Date: 06-05-2013
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17 May 2013, 08:13
3
KUDOS
D = 18(2/3) = 56/3

T = 2(2/3) = 8/3

S = D/T = 7
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17 May 2013, 08:56
SrinathVangala wrote:
D = 18(2/3) = 56/3

T = 2(2/3) = 8/3

S = D/T = 7

Ho wdo you calculate T ( T = 2(2/3) = 8/3 ) ??
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17 May 2013, 09:00
clciotola wrote:
SrinathVangala wrote:
D = 18(2/3) = 56/3

T = 2(2/3) = 8/3

S = D/T = 7

Ho wdo you calculate T ( T = 2(2/3) = 8/3 ) ??

The time is 2 hours and 40 mins. When we represent then in a fraction form in terms of hours, it would be 2 and 40/60 hours i.e. 2 and 2/3 in mixed form!

Hope it helps

Regards,
Arpan
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17 May 2013, 09:04
clciotola wrote:
SrinathVangala wrote:
D = 18(2/3) = 56/3

T = 2(2/3) = 8/3

S = D/T = 7

Ho wdo you calculate T ( T = 2(2/3) = 8/3 ) ??

let a(b/c) be the mixed fraction.

To convert it into a fraction. We can use this formula.

Fraction = a*c + b

Theory. :- Let D be the dividend. when D is divided by a divisor c .Let the quotient be a and the remainder b. We can write the dividend as D= a*c + b.

Its the same theory used to convert mixed fractions into proper ones
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Re: Martha biked 18 2/3 miles in 2 hours and 40 minutes. What wa [#permalink]

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17 Aug 2014, 10:13
Hello from the GMAT Club BumpBot!

Thanks to another GMAT 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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Re: Martha biked 18 2/3 miles in 2 hours and 40 minutes. What wa   [#permalink] 17 Aug 2014, 10:13
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