Homework Help: Math

Posted by Anonymous on Tuesday, November 6, 2012 at 3:26am.

A bicycle travels 42 meters for every 20 revolutions of the wheel. How many revolutions would the wheel make in a kilometer?

High school - Tarefa, Tuesday, November 6, 2012 at 6:35am
Maths
Math - Reiny, Tuesday, November 6, 2012 at 8:12am
use a simple ratio
let the number of revolutions in 1 km be n

n/1000 = 20/42
x = 1000(20/42) = 10000/21 or appr 476.2 revolutions

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