Answer:
(i) 59.38 m^2
(ii) 64.77 m^2
Explanation:
(i)
The lateral area of a cylinder is ...
A = πdh
A = π(4.2 m)(4.5 m) = 18.9π m^2 ≈ 59.38 m^2 . . . tank wall area
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(ii)
If that represents 11/12 of the steel used, then the steel used is ...
(12/11)(59.38 m^2) ≈ 64.77 m^2 . . . steel used
