find the volume and surface area of a sphere whose radius is 4.2 CM
Answers
T. S. A of sphere = 4πr²
= 4 ×22/7 × (4.2)²
= 88/7 ×17.64
= 88 × 2.54 (divided 17.64 by 7 )
= 223.52 cm²
volume of sphere = 4/3πr³
= 4/3 ×22/7 × (4.2)³
= 88/21 ×74.088 (multiply 4/3 and 22/7)
=88 ×3.528 divided 74.088 by 21
=310.464 cm³ ans.
Hope! it will be helpful for you
Answer:
T. S. A of sphere = 4πr²
= 4 ×22/7 × (4.2)²
= 88/7 ×17.64
= 88 × 2.54 (divided 17.64 by 7 )
= 223.52 cm²
volume of sphere = 4/3πr³
= 4/3 ×22/7 × (4.2)³
= 88/21 ×74.088 (multiply 4/3 and 22/7)
=88 ×3.528 divided 74.088 by 21
=310.464 cm³ ans.
Hope! it will be helpful for you