The amount of steel required to make 297 rods is; 128761.4 m²
What is the surface area of a cylinder?
The formula for the surface area of a cylinder is;
S.A = 2πr² + 2πrh
Where;
r is radius
h is height
We are given:
Radius = 3 cm
Height = 20 cm
Thus:
S.A = 2π(3)² + 2π(3 * 20)
S.A = 433.54 m²
Thus;
Steel to make 297 rods = 297 * 433.54
= 128761.4 m²
Complete question is;
A company makes steel rods shaped like cylinders. Each rod has a radius of 3 centimeters and a height of 20 centimeters. How much steel will the company need to make 297 rods?