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makkiz
[27]
2 years ago
12
If a spherical ball is enlarged so that its surface area is 9 times greater than its original surface area, then the original ra
dius was multiplied by _________.
Mathematics
Answer
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1
answer:
luda_lava
[24]
2 years ago
6
0
The surface area of a sphere is
and if the original S.A was is enlarged to have it 9 times greater, the radius would be multiplied by 3 or roughly 2.99626 rounded off to 3.0.
For example, let us assign values.
Let A=90
A= 90*9 = 810
and
the first r is 2.68 and the second r is 8.03
then,
or rounded off to 3.
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