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Question:

A patient in a hospital is given soup daily in a cylindrical bowl of diameter 7 cm. If the bowl is filled with soup to a height of 4 cm, how much soup does the hospital have to prepare daily to serve 250 patients?

Solution:

Radius = 7/2 = 3.5 cm, height of bowl = 4 cm (soup level)
Volume of soup = πr²h = (22/7) × 3.5 × 3.5 × 4 = 154 cm³
Volume of soup given to 250 patients = 250 × 154 = 38500 cm³ = 38500/1000 l = 38.5 l