## tayluvsya Group Title help plez one year ago one year ago

1. tayluvsya Group Title

2. ZeHanz Group Title

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...

3. tayluvsya Group Title

thnks @ZeHanz

4. ZeHanz Group Title

YW! ;)

5. tayluvsya Group Title

i still didnt get it right i need the answer plez

6. tayluvsya Group Title

its soooooooo confusing

7. AravindG Group Title

can u show ur working ? let me see where are u getting stuck

8. tayluvsya Group Title

i dont get it at all

9. AravindG Group Title

just do what zehanz said above :)

10. AravindG Group Title

just use the formula !

11. tayluvsya Group Title

i dont get it

12. AravindG Group Title

what value did u get for r ?

13. lilcici Group Title

28

14. ZeHanz Group Title

No, 28 is the diameter :(

15. lilcici Group Title

so 24

16. lilcici Group Title

$V=\frac{ 4 }{ 3 } \pi 24^{3}$

17. ZeHanz Group Title

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...

18. lilcici Group Title

im srry just tired forgot to half my problem thnks for correcting me

19. ZeHanz Group Title

yw!

20. lilcici Group Title

$V=\frac{ 4 }{ 3 } \pi 14^{3}=11494.04032$

21. ZeHanz Group Title

Right! So if you round to the nearest 500, you'll have the answer option of the original problem.

22. lilcici Group Title

thnks again