The surface area of a sphere is 616cm². Find the radius.(TT=22/7)
a)7cm.
b)5cm
c)6cm
d)8cm
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Answer:
solu: Area of a sphere = 4Πr².
= 616cm² = 4×22/7×r².
= r² = 616×7/4×22.
= r² = 154×7/22.
= r² = 7×7.
= r² = 49.
= r² = √49.
= r = 7cm. Ans…
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