Please solve Volume Surface Area Questions 17,18,19,20
Attachments:
Answers
Answered by
2
Hello Mate!
Please refer to attachment.
Concept used in mentioned solutions.
17. Why total surface area of cylinder is 2π(R+r)(h+R-r)?
TSA = 2πRh + 2πrh + 2π( R² - r² )
= 2πh( R + r ) + 2π( R + r )( R - r )
= 2π( R + r )( h + R - r )
18. Area of sheet which is rapped around cylinder will be equal to its curved surface area.
19. Volume of Outer - Inner cylinder = Volume if actual cylinder
= πR²h - πr²h
= πh( R² - r² )
= πh( R + r )( R - r )
20. Basic knowledge of fomulas.
Have great future ahead!
Please refer to attachment.
Concept used in mentioned solutions.
17. Why total surface area of cylinder is 2π(R+r)(h+R-r)?
TSA = 2πRh + 2πrh + 2π( R² - r² )
= 2πh( R + r ) + 2π( R + r )( R - r )
= 2π( R + r )( h + R - r )
18. Area of sheet which is rapped around cylinder will be equal to its curved surface area.
19. Volume of Outer - Inner cylinder = Volume if actual cylinder
= πR²h - πr²h
= πh( R² - r² )
= πh( R + r )( R - r )
20. Basic knowledge of fomulas.
Have great future ahead!
Attachments:
Similar questions