3. Find the surface area of spherical ball whose radius is 6 mm.
a. 452.16 mm2
b. 425.61 mm2
c.245.16 mm2
d. 524.61 mm2
a. 452.16 mm2
b. 425.61 mm2
c.245.16 mm2
d. 524.61 mm2
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Question :
3. Find the surface area of spherical ball whose radius is 6 mm.
Choices :
a. 452.16 mm²
b. 425.61 mm²
c.245.16 mm²
d. 524.61 mm²
ANSWER AND SOLUTION :
Use this formula SA= 4 πr² to get the Surface Area.
SA = 4 πr²
= 4 × 3.14 ×( 6mm)²
= 4 × 3.14 × 36 mm²
= 452.16 mm²
✒️ Therefore, the surface area of the ball is A. 452.16 mm².