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Question

Height of a cylindrical barrel is 50 cm and radius of its base is 20 cm. When it was empty, Anurag started to fill the barrel with water, by a cylindrical mug. The diameter and height of the mug was 10 cm and 15 cm respectively. How many minimum number of mugs will be required for the barrel to overflow?

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Solution

Given,
Height of the cylindrical barrel=50 cm
Radius of its base=20 cm
Height of the cylindrical mug=15 cm
Diameter of the cylindrical mug=10 cm
Radius of the cylindrical mug=102 cm=5 cm

Volume of the cylindrical barrel=πr2h
=π×(20)2×50 cm3
=20000π cm3

Volume of the cylindrical mug=πr2h
=π×(5)2×15 cm3
=375π cm3

minimum number of mugs required to fill the barrel =volumeofbarrelvolumeofmug

=20000π375π

=20000375
=53.33
Hence, the minimum number of mugs will be required for the barrel to overflow is 54.


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