The figure shows a solid cylinder of diameter 24 cm and height 32 cm. A cylinder of diameter
10 cm and height 14 cm is removed from the
original cylinder.

(i) Find the volume of the remaining solid.
The remaining solid is to be painted on all
its surfaces.
(ii) Find the area that will be covered in paint.
2

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204

answer: i wpould go with c

step-by-step explanation:

answer: a

step-by-step explanation: the answer is a due to the rule of symmetry; that a line of symmetry must divide a figure into 2 pieces that are the exact same, only reflected over a line of symmetry. b and c do not have lines of symmetry and would not divide the figure evenly, thus making the answer a.

ѕнє ¢αи ∂яινє 132 кιℓσмєтєяѕ

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