Answer: 71.6 [tex]cm^2[/tex] ( approx)
Step-by-step explanation:
Here, team in science class placed a chalk mark on the side of a wheel and rolled the wheel in a straight line until the chalk mark returned to the same position.
And, The team then measured the distance the wheel had rolled and found it to be 30 cm.
Let r is the radius of the wheel.
Then According to the question, [tex]2\pi r = 30[/tex]
⇒[tex]r = 30/2\pi[/tex]
⇒[tex]r = 15/\pi[/tex]
Thus, The area of the wheel, [tex]A= \pi r^2= \pi \times 15/\pi \times 15/\pi[/tex]
⇒[tex]A=1575/22=71.5909090909[/tex]≈71.60
Therefore, the area of the wheel = 71.6 square unit.
