Question

If the radius of sphere is
doubled, then the ratio of surface area
a)1:4
b)2:4
c)1:5
d)2:3​

Answer 1

If the radius of a sphere is doubled , then the increase in surface area is 300% The increase in surface area is 300% when the radius of a sphere is doubled. Therefore it is concluded that if the radius of a sphere is doubled then the ratio of their surface area is 4 times the old area

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Answer 2

Answer:

b

Step-by-step explanation:

If the radius of a sphere is doubled , then the increase in surface area is 300% The increase in surface area is 300% when the radius of a sphere is doubled. Therefore it is concluded that if the radius of a sphere is doubled then the ratio of their surface area​ is 4 times the old area.