Find (1) The total surface area of a closed cylindrical petrol storage tank whose diameter
4.2 m. and height 4.5 m.
(i) How much steel sheet was actually used, if 1/12
of the steel was wasted in making
of the tank. (anewer quickly and steps in order )​

The total surface area of a closed cylindrical petrol storage tank whose diameter is 4.2m. and height 4.5m. is 87.12sq. m how much steel sheet was actually used , if 1/12 of the steel was wasted in making the tank.

Since 1/12 of the actual steel used was wasted, the area of the steel which has gone into the tank = 11/12 of x.

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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idk the answer i want to say 10 but then it would be equal so try 9 but then yeah so yeah we love edgen