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प्रश्न
A cylinder has a diameter of 20 cm. The area of the curved surface is 100 cm2 (sq. cm). Find the volume of the cylinder correct to one decimal place.
उत्तर
Diameter of the cylinder = 20 cm
Hence, Radius (r) = 10 cm
Height = h cm
Volume of the cylinder = πr2h
= `22/7 xx 10 xx 10 xx 1.6`
= `(22 xx 100 xx 1.6)/7`
= 502.857 cm3
= 502.9 cm3
or
= `22/7 xx 10 xx 10 xx 35/22`
= 500 cm3
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