50 circular plates , each of radius 7 cm, and thickness 1/2 cm are placed one above another to form a solid right circular cylinder. Find the total surface area and the volume of the cylinder so formed.
Answers
Answered by
90
Radius of the cylinder=radius of the plate=r=7cm
Height of the cylinder=h= No. of plates × thickness of one plate=50×1/2 =25 cm
∴, total surface area= curved surface area+ 2×area of tha base
=2πrh+2πr²
=2πr(h+r)
=2×22/7×7(25+7)
=44×32
=1408 cm²
Volume of the cylinder
=πr²h
=22/7×7²×25
=22×7×25
=3850 cm³
∴, total surface area is 1408 cm² and volume is 3850 cm³. Ans.
Height of the cylinder=h= No. of plates × thickness of one plate=50×1/2 =25 cm
∴, total surface area= curved surface area+ 2×area of tha base
=2πrh+2πr²
=2πr(h+r)
=2×22/7×7(25+7)
=44×32
=1408 cm²
Volume of the cylinder
=πr²h
=22/7×7²×25
=22×7×25
=3850 cm³
∴, total surface area is 1408 cm² and volume is 3850 cm³. Ans.
Answered by
19
Radius-7 cm
H=50*0.5=25 cm
T.S.A=2*22/7*r(h+r)
=2*22/7*7(25+7)
=44*32
=1408 cm sq
Hope it helps!!!
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