find the surface area of a sphere of radius
i 10.5cm ii 5.6cm iii 14 cm
Answers
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Step-by-step explanation:
=10.5cm
SA=4πr
2
=4×
7
22
×
10
10.5
×
10
10.5
=
100
88×15×105
=1386 cm
2
(ii) r=5.6cm
SA=4πr
2
=[4×
7
22
×(5.6)
2
]cm
2
=[
7
88
×
10
5.6
×
10
5.6
]cm
2
=394.24 cm
2
(iii) r=14cm,
SA=4πr
2
=4×
7
22
×14×14
=2464 cm
2
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