Drink it quick!” I looked at the bottle. The contents were unlike any I’d ever seen. I closed my eyes and drank it in one gulp. Should be at least 850 words long....or more...BE CREATIVE!!!
Answers
Answer:
Given:
The length (h) of the hollow metallic cylinder is 77cm
The inner diameter = 4 cm
The inner radius (r) = 4/2 = 2 cm
Also, thickness is 0.2 cm
So, outer radius (R) = inner radius + thickness
R = 2 + 0.2 = 2.2 cm
Now,
To find:
The Total Surface Area of the hollow cylinder
The formula to find the TSA of the hollow cylinder is
= 2π (R + r)(h + R - r) unit sq,
[In which, 'R' is the outer radius, 'r' is the inner radius and 'h' is the height(i.e. length) of the hollow cylinder]
Now putting the given values,
\bf TSA = 2*\frac{22}{7}(2.2+2)(77+2.2-2)TSA=2∗722(2.2+2)(77+2.2−2)
\bf TSA = 2*\frac{22}{7}(4.2)(79.2-2)TSA=2∗722(4.2)(79.2−2)
\bf TSA = 2*\frac{22}{7}(4.2)(77.2)TSA=2∗722(4.2)(77.2)
\bf TSA = \frac{14266.56}{7}TSA=714266.56
TSA of the hollow metallic cylinder = 2038.08 cm sq.
MORE INFORMATION:
The total surface area of the hollow cylinder
= 2πRh + 2πrh + 2π(R² - r²)
= 2πh(R+h) + 2π(R + r)(R - r)
= 2π(R + r)(h + R - r)