T has 4 times what R has, so 2.105*4 which is 8.42
I think B should be the answer
Answer:
the third one 10 cm, 9cm 9cm
Answer:
1 neither
2 supplementary
3 supplementary
Step-by-step explanation:
The surface area of a cylinder with circular bases of radius <em>r</em> and height <em>h</em> is equal to the sum of the areas of the two circular faces and the area of the rectangular lateral surface:
<em>A</em> = 2π<em>r</em>² + 2π<em>rh</em>
If you know the height <em>h</em>, then you can solve the quadratic equation for <em>r</em>.
