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.
Answered Feb 05, 2023
Correct Answer - (i) 1m (ii) `1.54 m^(3)`
Correct Answer - A`=2pirh`
Correct Answer - `72 sqrt(3) cm^(2)`
Correct Answer - `269.5 cm^(3)`
Correct Answer - `1078 cm^(3)`
Correct Answer - Rs 6600
Correct answer is (b) We know that \(\tau\) = r × F ∵ \(\tau\) \(= \frac{dL}{dt},\) \(F = \frac{dP}{dt}\) \(\left(\frac{dL}{dt}\right) = r \times \left(\frac{dP}{dt}\right)\) \(\left(\frac{dL}{dt}\right) - r \times \left(\frac{dP}{dt}\right) = 0\)
CSA (cone) = πrl = 12320 \(\frac{22}{7}\) × 56 × l = 12320 l = 70 cm h = \(\sqrt{70^2-56^2}\) = 42 cm
Correct option is (C) 48 cm2 \(\therefore\) Curved surface area of formed cylinder = Area of rectangular sheet = 12 \(\times\) 4 \(=48\,cm^2\)
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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