Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • NCERT
  • A metal pipe is 77 cm long. The inner diameter of a cross section is 4 cm, the outer diameter being 4 point 4 cm. Find its (ii) outer curved surface area

Q : 3    A metal pipe is \small 77\hspace{1mm}cm long. The inner diameter of a cross section is \small 4\hspace{1mm}cm, the outerdiameter being  \small 4.4\hspace{1mm}cm (see Fig. \small 13.11). Find its

              (ii) Outer surface area.

                

Answers (1)

best_answer

Note: There are two surfaces, inner and outer.

Given,

Height of the cylinder, h = 77\ cm

Outer diameter  = r_1 = 4.4\ cm

Inner diameter  = r_2 = 4\ cm

Outer curved surface area = 2\pi r_1h

\\ = 2\times\frac{22}{7}\times2.2\times77 \\ = 1064.8\ cm^2

Therefore, the outer curved surface area of the cylindrical pipe is 1064.8\ cm^2

Posted by

Nehul

View full answer

Similar Questions

Trending Articles/News

anam-khan

CBSE Board Exam 2025: Class 10, 12 practical exam dates out at cbse.gov.in; passing marks
anam-khan

CBSE urges schools to complete 100% registration of Class 9, 11 students by October 16; late fee for delays

Latest Question