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OpenStudy (anonymous):
A tyre with diameter 30cm, travels 5km. How many times does the tyre rotate?
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OpenStudy (anonymous):
I might be wrong... But what if you calculated the circle's perimeter ( 2 x pi x radius) and then divided 5km/first answer?
OpenStudy (anonymous):
2 x radius = diameter, so 30 pi would be the first answer. 30 times 3, 14 equals 94,2
OpenStudy (anonymous):
hmmm
OpenStudy (anonymous):
500000 cm / 94,2 cm would be your final answer... I guess.
OpenStudy (anonymous):
close.
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OpenStudy (anonymous):
my text gave the answer 5305, your gave me 5307
OpenStudy (anonymous):
I used 3,14 = pi... That's the value we use in Brazil. Calculate it again with 3,14159265, it might give you the correct answer.
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