the ratio of the radius and height of a cylinder is 2:3 . if its volume is' 12936cm cube ' find total surface area of cylinder .
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Let the height and radius are
3x and 2x.
V = 22/7 × 2x × 2x × 3x
12936 = 264x /7
12936 × 7 / 264 = x
343 = x
h = 3 × 343 = 1029
r = 2 × 343 = 686
tsa = 2 × 22 / 7 × 686 ( 689 + 1029 )
2 × 22 / 7 × 686 × 1715
2 × 22 / 7 × 1176490
44 / 7 × 1176490
51765560 /7
7395080.
3x and 2x.
V = 22/7 × 2x × 2x × 3x
12936 = 264x /7
12936 × 7 / 264 = x
343 = x
h = 3 × 343 = 1029
r = 2 × 343 = 686
tsa = 2 × 22 / 7 × 686 ( 689 + 1029 )
2 × 22 / 7 × 686 × 1715
2 × 22 / 7 × 1176490
44 / 7 × 1176490
51765560 /7
7395080.
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