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Question

Find the surface area (in cm sq.) of a container with radius 4 cm and height 10 cm, The container is open from the top.


  1. 301.6
  2. 351.9
  3. 251.3
  4. 421.6


Solution

The correct option is A 301.6

Given, radius of the container = 4 cm
Height of the container = 10 cm

We know that,
Surface area=2πrh+πr2=2×227×4×10+227×4×4
=251.42 cm sq.+ 50.28 cm sq.
=301.7 cm sq.

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