Question

find the total area surface of of a closed cylindrical drum it's diameter is 50cm and height is 45cm. (r=3.14​

Answer 1

$\huge\underline\bold\pink{Answer:-}$

Given:-

• Diameter ( d ) = 50 cm

Radius ( r ) = d/2 = 50/2 = 25 cm

• Height ( h ) = 45 cm

• π = 3.14

Figure :-

$\setlength{\unitlength}{1mm}\begin{picture}(5,5)\thicklines\multiput(-0.5,-1)(26,0){2}{\line(0,1){40}}\multiput(12.5,-1)(0,3.2){13}{\line(0,1){1.6}}\multiput(12.5,-1)(0,40){2}{\multiput(0,0)(2,0){7}{\line(1,0){1}}}\multiput(0,0)(0,40){2}{\qbezier(1,0)(12,3)(24,0)\qbezier(1,0)(-2,-1)(1,-2)\qbezier(24,0)(27,-1)(24,-2)\qbezier(1,-2)(12,-5)(24,-2)}\multiput(18,2)(0,32){2}{\sf{25}}\put(9,17.5){\sf{45cm}}\end{picture}$

To find :-

• Total Surface Area of the drum

Formula used :-

• 2πr( h + r )

Solution:-

= 2 × 3.14 × 25 ( 45 + 25 )

= 2 × 3.14 × 25 × 70

= 10990 cm²

Final answer:-

• Total Surface Area of the closed Cylindrical Drum is 10990 cm² .