Answer:
C
Step-by-step explanation:
Δ AQP and Δ ACB are similar triangles, thus the ratios of corresponding sides are equal, that is
= 
( note that AC = 3 + 6 = 9 ), substitute values
= 
( cross- multiply )
3BC = 40.5 ( divide both sides by 3 )
BC = 13,5 cm → C
Answer: 62.83 m
<u>Step-by-step explanation:</u>
The distance of one rotation is the perimeter of the wheel <em>(which is called "circumference" since it is in the shape of a circle)</em>
Circumference (C) = 2 π · radius (r)
C = 2π (10)
= 20π
≈ 62.83
2/21 is the answer
Hope this helps
