Doubtly
@Doubtly · Joined Feb 2021
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- Surface area of a cone is 188.4 sq.cm and its slant height is 10 cm. Find its perpendicular height (π = 3.14). Given: Length (l) =10 cm, curved surface area of the cone = 188.4 sq.cm To find: Perpendicular height (h) of the cone i.Curved surface area... 1
- Curved surface area of a cone is 251.2 cm2 and radius of its base is 8 cm. Given: Radius (r) = 8 cm, curved surface area of cone = 251.2 cm² To find: Slant height (l) and the perpendicular height (h) of the cone i.C... 1
- Radius of base of a cylinder is 20 cm and its height is 13 cm, find its curved surface area and total surface area Given: Radius (r) = 20 cm, height (h) = 13 cm To find: Curved surface area and the total surface area of the cylinder i.Curved surface area... 1
- If the radius of a solid hemisphere is 5 cm, then find its curved surface area and total surface area, (π = 3.14) Given: Radius (r) = 5 cm To find: Curved surface area and total surface area of hemisphere i.Curved surface area of hemisphere = 2πr² = 2 x... 1
- Two trains start at same time from stations A and B. 1800 km apart, and proceed towards Correct Answer - Option 4 : 880 km from station A Given : Two trains start from point A and B Distance between them is 1800 km Speed of trai... 1
- Two stations L and M are 180 km apart from each other. A train leaves from L to M Correct Answer - Option 2 : 13.5 km/hr Given: The distance between L and M = 180 km Formula used: S\ =\ Dover T (Where S = The speed, D = Th... 1
- Darts are being fired from a point at an interval of 12 minutes, if the speed of the bullets is 60 kmph. Correct Answer - Option 4 : 12 kmph GIVEN: Darts are being fired from a point at an interval of 12 minutes. Speed of the bullets = 60 kmph A... 1
- The sentence are statement? Justify. Sky is red. A statement is a declarative sentence if it is either true or false but not both. The given sentence “sky is Red” is false. Hence, it is a f... 1
- The converse of the statement “If sun is not shining, then sky is filled with clouds” is Let p:Sun is not shining. q:Sky is filled with clouds. So, The converse of the statement p→ q is q→ p. Therefore, q→ p : If sky is filled wi... 1
- ______ is a large curve of different colors in the sky that is caused by the sun shining through rain. Correct option isA) rainbow 2
- Which of the following are considered to be as the primary colors? a. Orange, Purple, Green b. Red, Green, Blue Correct answer is d. Red, Yellow, Blue 2
- Define Primary & Secondary colors. Primary colors: These cannot be produced by mixing any other color. These are red, yellow and blue. Secondary colors: These are made by mixi... 1
- What crop was farmed by Lencho? Lencho cultivated (farmed) the corn. 2
- Solve the quadratic equation : x2 + 3x - 9 = 0 for x. Solution: x = −b ± √(b² − 4ac)/2a x = -3 ± √[(3² − 4.1(-9)]/2.1 x = -3 ± √(45)/2 1
- We want answer of question where is the question , please add comment to the question 1
- Find the area of the region enclosed by the curves \( y^{2}=x, x=\frac{1}{4}, y=0 \) and \( x=1 \), using integration. Bounded area = ∫limits_(1/4)¹ y dx = ∫limits_(1/4)¹sqrt x dx = 2/3[x^(3/2)]_(1/4)¹ = 2/3(1-1/8) = 7/3×7/8 = 7/12 square units 1
- Find the area enclosed by the curves y=x^2, x=1/4, y=0 and x=1, using integration. Enclosed area = ∫limits ¹_ 1/4 x² dx = [fracx³3]¹₁/4 = 1/3 (1 -frac164) = 63/64 × 3 = 21/64 1
- \( x\left(x^{2}+1\right)^{-1 / 2} \) find dy/dx using chain rule frac ddx x(x² + 1)^frac-12 = xfrac ddx (x² + 1)^frac-12 + dx/dx × (x² + 1)^frac-12 = x× frac-12 (x² + 1)^frac-12-1 d/dx (x² + 1) + (x² + 1)^... 1