Question

find the surface area of spear of radius 10.5?​

Answer 1

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Answer 2

Answer: 1386 sq. units

Step-by-step explanation:

Radius of Sphere = 10.5

Surface of Sphere = $4\pi r^2$

Surface of Sphere

$= 4\pi (10.5)^2$

$=4 \times \dfrac{22}{7} \times 10.5 \times 10.5$

$=4 \times \dfrac{22}{7} \times \dfrac{105}{10} \times \dfrac{105}{10}$

= 1386