Cowling's rule

Cowling rule is another method for determining the dosage of a drug to prescribed to a child. For this rule, the formula

d=D(a+1)
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gives the child's dosage d, Where D is the adult dosage and a is the age of the child in years. If the adult dosage of a drug is 600 milligrams and a doctor uses this formula to determine that a child's dosage is 200 milligram, then how old is the child?

Solution Summary

This provides an example of using Cowling's rule to determine the age of a child with a specified dosage.