Given:
For cylindrical drum:
Diameter (d) = 50 cm and height (h) = 45 cm
To find: Total surface area of the cylindrical drum
Diameter (d) = 50 cm
∴ radius (r) = \(\cfrac{d}{2}\)= \(\cfrac{50}{2} =25\,cm\)
Total surface area of the cylindrical drum = 2πr (h + r)
= 2 x 3.14 x 25 (45 + 25)
= 2 x 3.14 x 25 x 70
= 10,990 sq.cm
∴ The total surface area of the cylindrical drum is 10,990 sq.cm.
