geometry

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A ball gas a radius of 56mm

(a)Calculate the surface area

(b)What is the volume of the sphere

• geometry -

Part A
a = 4*pi*r^2
= 4*pi*56^2

Part B
v= (4/3)*pi*r^3
= (4/3)*pi*(56^3)

• geometry -

i don't kno lol could u help give me answer?

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