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NCERT Solutions Class 8 Mathematics Solutions for Exercise 11.3 in Chapter 11 - Mensuration
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Q10) 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.
Answer:
Solution 10:
For the cyclindrical container the label will have raidus = \frac{14}{2}\ cm\ =7cm
height = 20cm -2cm -2cm
=16cm
The area of label = lateral surface area
= 2\pi rh
=2\times\frac{22}{7}\times7\times16
=704\ cm^2
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