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# A school provides milk to the students daily in cylindrical glasses of diameter 7 cm. If the glass is filled with milk upto a height of 12 cm, find how many litres of milk is needed to serve 1600 students.

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M.L Aggarwal book Important Question of class 10 chapter Based on Mensuration for ICSE BOARD.
In this question given that a school provides milk to the students daily in cylindrical glasses if diameter and height for that glass is given then you have to find that how many litres of milk is needed to serve 1600 students.
This is the Question Number 03, Exercise 17.1 of M.L Aggarwal.

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1. Given diameter of the cylindrical glass, d = 7 cm

Radius, r = d/2 = 7/2 = 3.5 cm

Height of the cylindrical glass, h = 12 cm

Volume of the cylindrical glass, V = r2h

= (22/7)×3.52×12

= 462 cm3

Number of students = 1600

Milk needed for 1600 students = 1600×462

= 739200 cm3

= 739.2 litres [∵1000 cm3 = 1 litre]

Hence the amount of milk needed to serve 1600 students is 739.2 litres.

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