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# A bicycle wheel has a diameter 0.71m. How many complete

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Manager
Joined: 04 Jan 2013
Posts: 79

Kudos [?]: 17 [0], given: 1

A bicycle wheel has a diameter 0.71m. How many complete [#permalink]

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06 Jan 2013, 05:37
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Question Stats:

59% (01:14) correct 41% (01:01) wrong based on 66 sessions

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A bicycle wheel has a diameter of 0.71m. How many complete revolutions does it make in 1km?

A. 246
B. 448
C. 1408
D. 710
E. 223
[Reveal] Spoiler: OA

Last edited by Bunuel on 07 Jan 2013, 02:10, edited 1 time in total.
Edited the question.

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Manager
Joined: 12 Mar 2012
Posts: 93

Kudos [?]: 347 [0], given: 22

Location: India
Concentration: Technology, Strategy
GMAT 1: 710 Q49 V36
GPA: 3.2
WE: Information Technology (Computer Software)
Re: A bicycle wheel has a diameter 0.71m.How many complete revol [#permalink]

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06 Jan 2013, 05:43
1 revolution = 3.14 * diameter.
Number of revolutions in 1km = 1000m / ( 3.14 * 0.71m ) = 448.5. Hence 448 complete revolutions.

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Re: A bicycle wheel has a diameter 0.71m. How many complete [#permalink]

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06 Jul 2017, 22:59
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Re: A bicycle wheel has a diameter 0.71m. How many complete [#permalink]

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06 Jul 2017, 23:23

Kudos [?]: 128752 [0], given: 12182

Director
Joined: 22 May 2016
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Kudos [?]: 258 [0], given: 547

A bicycle wheel has a diameter 0.71m. How many complete [#permalink]

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07 Jul 2017, 16:33
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chiccufrazer1 wrote:
A bicycle wheel has a diameter of 0.71m. How many complete revolutions does it make in 1km?

A. 246
B. 448
C. 1408
D. 710
E. 223

Circumference is $$d*\pi$$ = (.71m)($$\pi$$), rounding:

$$\frac{7}{10}$$m * $$\frac{22}{7}$$ = $$\frac{22}{10}$$m, or 2.2 m = circumference

1km = 1,000m, which is distance

Distance/circumference = # of revolutions

$$\frac{1,000 m}{2.2 m}$$ = 454 revolutions

Answer B is the only one that's close.

Kudos [?]: 258 [0], given: 547

A bicycle wheel has a diameter 0.71m. How many complete   [#permalink] 07 Jul 2017, 16:33
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# A bicycle wheel has a diameter 0.71m. How many complete

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