Volume formula of a sphere:


r³
given:
r = 3
V =


(3)³
V =

× 27

V = 36

units³ (in terms of

)
V = 113.097 units³ ≈ 113.1 units³
1/2 of an hour is = 30
288 / 4.30=67
The answer is 67 miles per hour.
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