Answer:
See below.
Step-by-step explanation:
1) Please check the number of volume of steel. It should be 54,259.2
[tex] {cm}^{3} [/tex]
. Not 54,259.2 cm. Right?
2) If so,
First
The volume of single rod
[tex] = \pi \times ( { \frac{4}{2} })^{2} \times 60= \pi \times {2}^{2} \times 60= 4\pi \times 60= 4 \times 3.14 \times 60= 753.6 {cm}^{3} [/tex]
The number of rods
[tex] = \frac{54259.2}{753.6} = 72[/tex]