Exercise 13.4 Class 9th Maths || Surface area of a hemisphere and sphere

Exercise 13.4 Class 9th Maths || Surface area of a hemisphere and sphere 1. Find the surface area of a sphere of radius: (i) 10.5 cm 2.Find the surface area of a sphere of diameter: (i) 14 cm 3. Find the total surface area of a hemisphere of radius 10 cm 4.The radius of a spherical balloonincreases from 7 cm to 14 cm as air isbeing pumped into it. Find the ratio ofsurface areas of the balloon in the twocases. 5.A hemispherical bowl made of brass has inner diameter 105 cm. Find the cost of tin-plating it on the inside at the rate of Rs. 16 per 100 cm2. 6. Find the radius of a sphere whose surface area is 154 cm2. 7.The diameter of the moon is approximately one fourth the diameter of the earth. Find the ratio of their surface areas. 8. A hemispherical bowl is made of steel, 0.25 cm thick. The inner radius of the bowl is 5 cm. Find the outer curved surface area of the bowl. 9. A right circular cylinder just encloses a sphere of radius (See figure). Find: (i) Surface area of the sphere. 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   ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ ▬▬▬▬▬▬▬▬DISCLAIMER▬▬▬▬▬▬▬▬ 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 #areaofsphere