Question

the circumference of a bicycle wheels is 198 cm what is the approximate length of a spoke

Answer 1

$2\pi \times r = 198$
2×22/7×r=198
44/7×r= 198
r=198×7/44
r = 31.5

Answer 2

The length of a spoke is 31.5 cm.

Step-by-step explanation:

It is given that the circumference of a bicycle wheels is 198 cm.

Circumference of circle is

$C=2\pi r$

where, r is the radius of the circle.

Length of a spoke is equal to the radius of wheel.

Let r be the length of a spoke.

Substitute C=198, $\pi=\frac{22}{7}$ in the above formula.

$198=2(\frac{22}{7})r$

$198=\frac{44}{7}r$

Multiply both sides by $\frac{7}{44}$.

$198\times \frac{7}{44}=\frac{44}{7}r\times \frac{7}{44}$

$31.5=r$

Therefore, the length of a spoke is 31.5 cm.

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