Question

The total surface area of a closed cylindrical petrol storage tank whose diameter $4.2$ m and height $4.5$ m.

• A. $87.12$ sq. m
• B. $69.23$ sq. m
• C. $78.21$ sq. m
• D. $65.45$ sq. m

Answer 1

Answer: (A)

Total surface area of cylindrical tank $=2\pi r(r+h)=2\times \frac{22}{7}\times \frac{4.2}{2}(\frac{4.2}{2}+4.5)=13.2\times 6.6=87.12c{m}^2$