Marion was burned by exploding gas while trying to start his lawn mower. He burned both legs above the knees up through his chest, half of both arms, and the perineal area. What percentage of his body did he burn?

He burnt 37% of his body.

Explanation:

We can determine the percentage of body burn by using the rule of nines. This rule says that the head and neck, arms and hands, chest, stomach, upper back, and lastly, lower back equals 9% of the body each. The perineal area is 1% of the body surface, and the legs are 18% of the totality of the body.

Marion burnt his legs (18%), chest (9%), his arms (9%), and his perineal area (1%). If we add all up, the total is 37%.

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