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Nookie1986 [14]
3 years ago
9

If the diameter of the sphere is increased by 20% . By what % does its curved surface area increase?

Mathematics
1 answer:
mihalych1998 [28]3 years ago
8 0

Answer:

Curved surface area of sphere = 2πr × 2r=4πr^2;

The new diameter is 120/100 from the old diameter;

2R = (120/100)x(2r);

So, R = 1.2 x r;

Curved surface area of new sphere = 4πR^2 = 4π(1.2xr)^2= 4πr^2x1.44= curved surface of old sphere x (144%);

Finnaly, the increase is 44%.

Step-by-step explanation:

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looks like its the third choice.



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