A rectangular strip 25cm * 7cm is roteded about the longer side. Find the whole surface of the solid that is generated
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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.
This may be helpful
=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.
This may be helpful
Answered by
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☜☆☞hey friend ☜☆☞
here is your answer
→_→→_→→_→→_→
The solid so formed is a cylinder of height 25 cm and radius 7 cm and the formula of the total surface area is : = 1408 cm²
¯\_(ツ)_/¯
hope it will help you
Devil_king ▄︻̷̿┻̿═━一
here is your answer
→_→→_→→_→→_→
The solid so formed is a cylinder of height 25 cm and radius 7 cm and the formula of the total surface area is : = 1408 cm²
¯\_(ツ)_/¯
hope it will help you
Devil_king ▄︻̷̿┻̿═━一
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