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