Question
Penelope consumed 21 mℓ of medicine from a bottle containing containing 57 doses of medicine. After she had accidentally spilled 16 of the remaining medicine, only 45 doses of medicine were left. Calculate the total volume of medicine in the bottle at first in mℓ.
4 m

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Penelope consumed 21 mℓ of medicine from a bottle containing containing 57 doses of medicine. After she had accidentally spilled 16 of the remaining medicine, only 45 doses of medicine were left. Calculate the total volume of medicine in the bottle at first in mℓ.