Question

The diameter of an inflated ball is 18 cm. How many cubic centimetres of air does it contain? What is the surface area of the ball? (π = 3.14)

Answer 1

Answer:

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Answer 2

Answer:

it contains air = 3052.08 cm³

the surface area of the ball =  1017.36 cm²

Step-by-step explanation:

The diameter of an inflated ball is 18 cm

=> Radius of Ball = 18/2 = 9 cm

it contain air equal to volume of Ball

Ball is spherical

Volume of Ball = (4/3) πR³

= (4/3) * 3.14 * 9³

= 3052.08 cm³

it contains air = 3052.08 cm³

surface area of the ball = 4πR²

= 4 * 3.14 * 9²

= 1017.36 cm²

the surface area of the ball =  1017.36 cm²