Answer:
B
Step-by-step explanation:
Answer:
7
Step-by-step explanation:
Answer:
Area = 78.5
Step-by-step explanation:
31.4 = 2 x pi X r
r = 31.4/(2xpi) = 31.4(2 x 3.14) = 5
Area = pi x r^2 = 3.14 X 5^2 =3.14 x 25 = 78.5 units^2
H, r
Surface Area = 2πrh
If the h, is now h/3 and the r, now r/3
Surface Area = <span>2π*r/3*h/3
= </span><span>2πrh/9
</span><span>
The modified surface area is reduced by 9 times.
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