Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • NCERT
  • A wooden article was made by scooping out a hemisphere from each end of a solid cylinder, as shown in Fig. 13.11. If the height of the cylinder is 10 cm, and its base is of radius 3.5 cm, find the total surface area of the article.

Q9. A wooden article was made by scooping out a hemisphere from each end of a solid cylinder, as shown in Fig. 13.11. If the height of the cylinder is 10 cm, and its base is of radius 3.5 cm, find the total surface area of the article.

 

Answers (1)

best_answer

The required surface area is given by  :

Surface area of article   =   Surface area of cylindrical part (lateral surface area of the cylinder) +  2 (Surface area of hemisphere)

Now, area of cylinder   =\ 2\pi rh

=\ 2\pi \times 3.5\times 10

=\ 70\pi \ cm^2

And the surface area of hemisphere :  =\ 2\pi r^2

=\ 2\pi \times 3.5\times 3.5

=\ 24.5\pi\ cm^2

Thus the required area   =\ 70\pi\ +\ 2(24.5\pi)\ =\ 374\ cm^2

Posted by

Devendra Khairwa

View full answer

Similar Questions

Trending Articles/News

anam-khan

Board Exam Date 2025 Live: Bihar Class 10, 12 model papers out, time table soon; updates on CBSE, UP

Latest Question