NCERT solutions for Class 9 Math Surface Areas and Volumes || Exercise 13.3 Class 9th, Area of cone

Exercise 13.3 Class 9th Surface area and volume 1. Diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. Find its curved surface area and its total surface area. 2. Find the total surface area of a cone, if its slant height is 21 cm and diameter of the base is 24 cm. 3. Curved surface area of a cone is 308 cm2 and its slant height is 14 cm. Find (i) radius of the base and (ii) total surface area of the cone. 4. A conical tent is 10 m high and the radius of its base is 24 m. Find: (i) slant height of the tent. (ii) cost of the canvas required to make the tent, if the cost of a m2 canvas is Rs. 70. 5. What length of tarpaulin 3 m wide will be required to make conical tent of height 8 m and base radius 6 m? Assume that the extra length of material that will be required for stitching margins and wastage in cutting is approximately 20 cm 6. The slant height and base diameter of a conical tomb are 25 m and 14 m respectively. Find the cost of whitewashing its curved surface at the rate of Rs. 210 per 100 m2. 7. A Joker’s cap is in the form of a right circular cone of base radius 7 cm and height 24 cm. Find the area of the sheet required to make 10 such caps. 8. A bus stop is barricaded from the remaining part of the road, by using 50 hollow cones made of recycled cardboard. Each cone has a base diameter of 40 cm and height 1 m. If the outer side of each of the cones is to be painted and the cost of painting is Rs. 12 per m2, what will be the cost of painting all these cones? Important questions for class 10th    • 9 secant square A - 9 tan square A      • A road 7 m wide surrounds a circular park ...      • The perimeter of certain sector of a circl...      • A Man's annual income has increased by rup...      • Water is flowing at 0.7m/s through a circu...      • A military tent of height 8.25 m is the fo...      • A well with inside diameter of 10m is dug ...      • Video      • Video      • Video      • Video   Some important video on science topic    • Video      • Video      • Video      • Heat and Temperature class 7th last part      • Video      • Video      • Changes around us like Reversible ,Irrever...   Other important video out of syllabus    • Shortcut method of Natural Numbers  प्राकृ...      • Video      • Video      • Video      • Expanded form of a number, expanded form o...   Class 11th 12th mathematics important question    • Video      • Differentiation class 12th ,Method of Diff...      • Video      • Video      • Video      • Video   Video Is For Educational Purposes Only. Copyright Disclaimer Under 107 Of The Copyright Act 1976, Allowance Is Made For "Fair Use" For Purposes Such As Criticism, Comment, News Reporting, Teaching Scholarship And Research. Fair Use AS A Use Permitted By Copyright. ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ The Following Audio/Video Is Not Meant For Any Commercial Purpose It Is Just For Showing The Creativity Of An Artist. ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ Incase As Being The Copyright Owner If You Have Any Issue With Our Content You Can Mail Me At ([email protected]) We Will Respond Within 24hrs #dikshaacadmey #areaofcone #cone