Question

Find the surface area and volume of a beach ball of diameter 42 cm. ( π = 22/7)

Answer 1

Answer:

5544 cm²

38808 cm³

Step-by-step explanation:

Find the surface area and volume of a beach ball of diameter 42 cm. ( π = 22/7)

Beach ball is in shape of sphere

Surface area of Sphere = 4 π R²

Diameter = 42 cm
Radius = Diameter/2
R = 21 cm   π = 22/7

Surface area of Beach Ball = 4 * (22/7) * 21²

= 88 * 21 * 3

= 5544 cm²

Volume area of Sphere = (4/3) π R³

R = 21 cm   π = 22/7

Surface area of Beach Ball = (4/3) * (22/7) * 21³

= 88 * 21 * 3 * 7

= 38808 cm³

Answer 2

Answer:

i ) Surface area = 5544 cm²

ii ) Volume = 38808 cm³

Explanation:

It is given that,

Diameter of the beach ball

(d) = 42cm

π = 22/7

Radius (r) = d/2

= 42/2

= 21 cm

Now ,

i ) Surface area of the ball

= 4πr²

= 4×(22/7) × (21)²

= 5544 cm²

ii ) Volume of the ball (V)

= (4/3)πr³

= (4/3)×(22/7)×(21)³

= 38808 cm³

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