Question
In a circular sheet of paper of radius 20cm, a sector of
40% area is removed and the remaining part is used to make a conical surface. Find the volume of a conical surface.Solution
Area of Circle (60% portion) = 60/100 × π × (20)² Now, Area of Circle (60% portion) = surface area of the cone (πrl) 
60/100 × π × (20)² = π ×r × 20 r = 12 cm Height of the cone = √(20²-12²) = √256 = 16cm Volume of the cone = 1/3 πr²h = 1/3 × π × 12 × 12 × 16 = 768 π
Which of the following statements is/are true?
Statement A: Soil testing provides valuable information about nutrient levels, pH, and other soil ...
A 1.5 ha wheat crop filed was supplied with 6 cm depth of irrigation, compute how many liters of water has gone into the filed.
The trade name of the insecticide Imidacloprid is:
What is the primary purpose of the “Farmers’ FIRST” initiative by ICAR?
Three particles have diameters of 0.5, 1.5, and 0.15 mm. The three particles are
Match List-I with List-II and select the correct answer using the codes given below the lists.
Minimum Support Price is announced by the Government of India and is recommended by
Which of the following statements is/are true about soil erosion?
Statement A: Rill erosion is a more severe form of erosion compared to gully er...
Choose the odd one.
Which scientists proposed the model explaining muscle contraction mechanism in insect physiology?
Relevant for Exams:
