Question

rectangular strip 25 cm into 7 cm is rotated about the longer side find the total surface area of the solid thus generated​

Answer 1

Answer:

Dimension of rectangular strip = 25 cm × 7 cm When this strip is rotated about its longer side, Height of cylinder becomes = 25 cm Radius = 7 cm ∴ Total surface area of cylinder = 2πr (h+r) = 2 × 22/7 × 7 (25 + 7) = 2 × 22/7 × 7 × 32 = 1408 cm2Read more on Sarthaks.com - https://www.sarthaks.com/677427/rectangular-strip-rotated-about-longer-side-find-total-surface-area-solid-thus-generated

Answer 2

Dimension of rectangular strip = 25 cm × 7 cm When this strip is rotated about its longer side, Height of cylinder becomes = 25 cm Radius = 7 cm ∴ Total surface area of cylinder = 2πr (h+r) = 2 × 22/7 × 7 (25 + 7) = 2 × 22/7 × 7 × 32 = 1408 cm2Read more on Sarthaks.com - https://www.sarthaks.com/677427/rectangular-strip-rotated-about-longer-side-find-total-surface-area-solid-thus-generated

pls mark me brainlist pls