Question

a metal pipe is 77 cm long. the inner diameter of a cross section is 4 cm, the outer diameter being 4.4 cm find its total surface area

Answer 1

 ★★★ HIII FRIEND!! ★★★

HERE IS THE ANSWER..!!

==================================================================

→ Total surface area of a pipe = Inner curved surface area + outer curved surface area + areas of two bases :

⇒ 2πrh + 2πRh + 2π ( R the power 2 - r the power 2) or (R square - r square)

= [968+1064.8+2×227(4.84−4)] cm²

= (2032.8+447×0.84)cm²

=(2032.8+5.28)cm²=2038.08cm²

==================================================================

★★★ I HOPE THIS MAY HELP U!! ★★★

PLZZZ MARK IT AS BRAINLIST IF THIS ANSWER IS HELPFUL TO U!!