LunaPlant LunaPlant

13-07-2017
Mathematics

contestada

About how many revolutions must a 20-inch diameter wheel make in order to travel a distance of 100 feet?
A.1 1/2
B. 5
C. 9 1/2
D. 19

Respuesta :

Banabanana Banabanana

13-07-2017

С = πd = 3.14 * 20 = 62.8 in

1 ft = 12 in ⇒ 100 ft = 1200 in

1200/62.8 ≈ 19 revolutions

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