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You are probably aware of the formula to calculate the volume of a sphere with radius r:\[V=\frac{ 4 }{ 3 }\pi r^3\]so you only need to convert the diameter (28 cm) to the radius, and put that value into the formula...
thnks @ZeHanz

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Other answers:

YW! ;)
i still didnt get it right i need the answer plez
its soooooooo confusing
can u show ur working ? let me see where are u getting stuck
i dont get it at all
just do what zehanz said above :)
just use the formula !
i dont get it
what value did u get for r ?
28
No, 28 is the diameter :(
so 24
\[V=\frac{ 4 }{ 3 } \pi 24^{3}\]
In a circle, the radius is half the diameter, so if the diameter is 28, the radius is 14. If you want to solve problems such as the above, this knowledge is rather essential, I'm afraid...
im srry just tired forgot to half my problem thnks for correcting me
yw!
\[V=\frac{ 4 }{ 3 } \pi 14^{3}=11494.04032\]
Right! So if you round to the nearest 500, you'll have the answer option of the original problem.
thnks again

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