Given weight of child = 33 pounds
                            Â
= 33 x (1/2.2)
kg         Â
Since 1 kg = 2.2 lbs ---> 1 lb = (1/2.2) kg
                            Â
= 15 kg
The dosage is 12.5 mg / kg
  So for 1 kg the mass of Cephalexin is 12.5 mg
       for 15 kg the mass of
Cephalexin is 12.5x15 = 187.5 mg
Also the Cephalexin oral suspension 100 mg/mL
for 100 mg the volume is 1 mL
for 187.5 mg the volume is (187.5x1) / 100
                                      Â
= 1.875 mL
 Â
