## ineedhelponmyhw Group Title The ratio between the radii of two spheres is 9:2 What is the ratio of their volumes? 2 years ago 2 years ago

1. theyatin

cube the ratios

2. ineedhelponmyhw

is it 729:8 ?

3. theyatin

r:R is ratio between radii then r^3:R^3 is ratio between volume

4. ineedhelponmyhw

so am i correct then?

5. Mitul

$V1/V2 = (4*\pi*r1^3)/(4*\pi*r2^3)$

6. Mitul

Volume is proportional to the cube of the radius

7. ineedhelponmyhw

im confused am i wrong then?

8. kropot72

9. ineedhelponmyhw

ok thank you!

10. Mitul

Answer is correct.....i was just giving u the concept @ineedhelponmyhw

11. kropot72

You're welcome :)