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Question 7
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A spherical tank of diameter 3 m is filled with water from a pipe of radius 30 cm at 0.2 m per second. Calculate, correct to 3 significant figures, the time, in minutes, it takes to fill the tank. [Take = ].
- When k is added to the expression y2 – 12y, the expression becomes
(y + p)2. Find the values of p and k.
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