NCERT - Mathematics

Book: NCERT - Mathematics

Chapter: 11. Mensuration

Subject: Maths - Class 8th

Q. No. 10 of Exercises 11.3

Listen NCERT Audio Books - Kitabein Ab Bolengi

10

A company packages its milk powder in cylindrical container whose base has a diameter of 14 cm and height 20 cm. Company places a label around the surface of the container (as shown in the figure). If the label is placed 2 cm from top and bottom, what is the area of the label.

Given: Diameter of cylindrical container = 14 cm

Radius of cylindrical container, r = 7 cm


Height of cylindrical container = 20 cm


Height of the label, h = 20 – 2 – 2


= 16 cm


Curved surface area of label = 2 π r h


= 2 × (22/7) × 7 × 16


= 704 cm2


Hence the area of the label of 704 cm2.


11

Chapter Exercises

More Exercise Questions