A bicycle with tires 68cm in diameter travels 9.2km. How many revolutions do the wheels make?

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A bicycle with tires 68cm in diameter travels 9.2km. How many revolutions do the wheels make?

I'm guessing for this question I have to use the work done formula, am I right?

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Answer 1 · 2018-04-07T15:53:21

$4219$ $4219$ revolutions

Explanation:

diameter= 68cm
r= $\frac{68}{2} c m = 0.34 m$ $68/2cm=0.34m$
distance travelled=9.2 km=9200 m
circumference of the tire= $2 π r = 2 \cdot 3.14 \cdot 0.34 = 2.13 m$ $2pir=2*3.14*0.34=2.13m$
so, 1rev. $\to$ $rarr$ 2.13 m
2.13m $\to$ $rarr$ 1rev
1m $\to$ $rarr$ $\frac{1}{2.13} r e v$ $1/2.13rev$
$9200 m \to \frac{1}{2.13} \cdot 9200 = 4219$ $9200m rarr 1/2.13*9200=4219$ revolutions. (approx)

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A bicycle with tires 68cm in diameter travels 9.2km. How many revolutions do the wheels make?

I'm guessing for this question I have to use the work done formula, am I right?

1 Answer

Explanation:

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