Answer:
To calculate the surface area of a metal rod, you need to know its length and diameter. In your question, you mentioned that the diameter of the rod is 1.4, but you didn't specify the unit of measurement. Assuming the diameter is in centimeters, let's calculate the surface area.
The surface area of a cylindrical rod can be determined using the formula:
Surface Area = 2πr² + 2πrh,
where r is the radius of the rod and h is the height (length) of the rod.
Given the diameter of 1.4, we can calculate the radius (r) as half of the diameter:
r = 1.4 / 2 = 0.7 cm.
The height (length) of the rod is given as 1.5 cm.
Substituting the values into the surface area formula:
Surface Area = 2π(0.7)² + 2π(0.7)(1.5)
= 2π(0.49) + 2π(1.05)
= 0.98π + 2.1π
= 3.08π.
Therefore, the surface area of the metal rod is approximately 3.08π square centimeters.
Explanation:
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