2009
Mathematics
67ca00ce0c643c71d77dee1f
Find the radius of a sphere whose surface area is 154 cm2?
A.
7.00 cm
B.
3.50 cm
C.
3.00 cm
D.
1.75 cm
Correct Answer: 3.50 cm
Explanation
154 = 4 x 22/7 x r2 154 x 7r2 4 x 22 √ 49/4 = r 7/2 = r2 ∴ r = 3.50
154 = 4 x 22/7 x r2 154 x 7r2 4 x 22 √ 49/4 = r 7/2 = r2 ∴ r = 3.50THIS WEEK's
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