If the radius and height of a cylinder is x cm and y cm respectively, then the curved surface area of cylinder.
A) 2πx (x + y) cm2
B) 2π xy cm2
C) π x2y
D) 2π x2y cm2
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Curved surface area of a right circular cylinder is `4. 4" "m^2` . If the radius of the base of the cylinder is 0.7 m, find its height.
Correct Answer - (i) 1m (ii) `1.54 m^(3)`
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The total surface area of solid cylinder is `231 cm^(2)` and its curved surface area is `(2)/(3)` of the total surface area. Find the volume of the cy
Correct Answer - `269.5 cm^(3)`
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The ratio between the curved surface area and the total right circular cylinder is `1 : 2`. Find the volume of the cylinder if its total surface area
Correct Answer - `1078 cm^(3)`
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The curved surface area of a right circular cone is 12320 cm^2. If the radius of its base is 56cm, then find its height.
CSA (cone) = πrl = 12320 \(\frac{22}{7}\) × 56 × l = 12320 l = 70 cm h = \(\sqrt{70^2-56^2}\) = 42 cm
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If the radius and height of a cylinder is x cm and y cm respectively, then the curved surface area of cylinder.
Correct option is (B) 2π xy cm2 r = x cm & h = y cm \(\therefore\) Curved surface area of cylinder \(=2\pi rh\) = \(2\pi\,xy\,cm^2\)
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If the radius of a cylinder doubled, keeping its lateral surface area the same then its height is……………….
Correct option is (C) Decreased by 50% Let r and h be parameters of original cylinder & R and H be parameters of another cylinder. Let R = 2r Also \(2\pi RH=2\pi rh\) ...
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If the radius of a cylinder doubled, keeping its lateral surface area the same then its height is……………….
2 Answers
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If the radius of a cylinder doubled, keeping its lateral surface area the same then its height is……………….
2 Answers
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A hemispherical bowl has a radius of 3.5 cm, then its curved surface area is
Correct option is (A) 77 cm2 r = 3.5 cm Curved surface area of hemispherical bowl \(=2\pi r^2\) \(=2\times\frac{22}7\times3.5\times3.5\) \(=22\times3.5\) \(=77\,cm^2\)
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