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The percentage of his body surface area that has been burned is 21%.
The entire surface area is calculated by including all of the areas on the floor: the regions of the bottom, pinnacle, and lateral surfaces (aspects) of the object. that is done with the use of one-of-a-kind area formulas and measured in square devices. extent is the amount of area that a 3-dimensional item takes up.
To keep in mind, the floor area of an item is the full area of the out of doors surfaces of the three-dimensional object i.e, the whole sum of the area of the faces of the object. it's far measured in phrases of square gadgets.
The floor location is the full area included by means of all of the faces of a 3D item. as instance, if we need to locate the quantity of paint required to paint a dice, then the floor on which the paint could be implemented is its surface place. Its miles are constantly measured in square units.
Learn more about surface area here: https://brainly.com/question/76387
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