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Yasuo and Chiko are riding their motorcycles to a motorcycle rally 12

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Joined: 07 Jun 2018
Posts: 51
Location: United States
Yasuo and Chiko are riding their motorcycles to a motorcycle rally 12  [#permalink]

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New post 20 Jan 2019, 14:29
1
1
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

73% (02:56) correct 27% (03:47) wrong based on 36 sessions

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Yasuo and Chiko are riding their motorcycles to a motorcycle rally 12 miles away. The radius of Yasuo's front tire is 1.2 feet while the radius of Chiko's front tire is 1.6 feet. Approximately how many more rotations will Yasuo's front tire make than Chiko's front tire over the course of the trip?(5280 feet=1 mile) ( Assume they take the same route)

A. 550

B. 1100

C. 2200

D. 3300

E. 4400
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Joined: 18 Jul 2018
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Concentration: Finance, Marketing
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Re: Yasuo and Chiko are riding their motorcycles to a motorcycle rally 12  [#permalink]

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New post 20 Jan 2019, 16:04
Total distnace of the trip = 5280*12.

Total distance traveled in one rotation = circumference of the front tire = 2*π*r.

π is almost equal to 3.

Rotation of Yasuo's tire = 5280*12/(1.2*2*3) = 8800

Rotation of Chiko's tire = 5280*12/(1.6*2*3) = 6600.

Difference = 2200.

C is the answer.

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Re: Yasuo and Chiko are riding their motorcycles to a motorcycle rally 12   [#permalink] 20 Jan 2019, 16:04
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Yasuo and Chiko are riding their motorcycles to a motorcycle rally 12

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