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Calculus help????? oil spilled from a ruptured tanker spreads out in a circular slick. When the?
oil spilled from a ruptured tanker spreads out in a circular slick. When the radius of the slick is 100 ft the area of the slick is increasing 50 ft^/sec. find th erate of increase of the radius at that moment
A=(pi)r^2
1 Answer
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- 9 years ago
A = pi * r^2
dA/dt = 2 * pi * r * dr/dt
r = 100
dA/dt = 50
50 = 2 * pi * 100 * dr/dt
1/(4pi) = dr/dt
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