A rectangular strip of size 25 cm* 7 cm is rotated about the longer side . Find the volume and whole surface area of the solid thus generated ?
Answers
Answered by
94
the longer length of the rectangular strip =25cm become the circumference of the base of cylinder
=2pir
25=2x22/7xr
r=25x7/44
r=3.977cm
let the height h =7cm
volume of cylinder V = pir^2h
V=22x3.977x3.977x7/7
V=347.96cm^3
surface area S =2pir( h+r)
S=2x22x3.977/7(7+3.977)
S=44x3.977x10. 977/7
S=1920.84/7
S=274.40 cm^2.
=2pir
25=2x22/7xr
r=25x7/44
r=3.977cm
let the height h =7cm
volume of cylinder V = pir^2h
V=22x3.977x3.977x7/7
V=347.96cm^3
surface area S =2pir( h+r)
S=2x22x3.977/7(7+3.977)
S=44x3.977x10. 977/7
S=1920.84/7
S=274.40 cm^2.
Answered by
7
Answer:
12075/44
Step-by-step explanation:
plz subscribe my channel Super keys Yamaha
Attachments:
Similar questions