Step-by-step explanation:
volume of a cone is given by
[tex] \frac{\pi {r}^{2}h }{3} [/tex]
1st cone,
B= 25π cm²
πr²=25π
r²=25
r=5
Here, volume = π(5)²×3.5/3
=29.1π cm³
2nd cone,
r=3cm
Here, volume = π(3)²×6.5/3
= 19.5π cm³
3rd cone,
r= 4cm
Volume = π(4)²×4.5/3
=24π cm³
4th cone,
B=4π cm²
r²=4
r=2
volume = π(2)²×7.5/3
= 10π cm³
So, the third cone has vol 24π cm³
