An hour glass ismade using identical double glass comes of radius 5cm each .If total height is 24cm then find the surface area of the glass used
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Surface area of the glass used in making hour glass = 565.2 cm² where hour glass is made using identical double glass cones of Radius 5 cm each and total height = 24 cm
Step-by-step explanation:
Radius of cone = 5 cm
Total Height = 24 cm
Height of 1 cone = 24/2 = 12 cm
Lateral Height = √5² + 12² = 13 cm
Surface Area of one cone = πr² + πrL
= π( 5² + 5*13)
= 90π
Surface Area of 2 cones = 2 * 90π
= 180π
using π = 3.14
= 565.2 cm²
surface area of the glass used in making hour glass = 565.2 cm²
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