(4/pi)1/2 = 1.12838
To calculate the area of a circular shape you square the radius and times that by pi. So to find the radius from the area you divide the area by pi, then find the square root of the result. So the calculation would be
Divide 4 by Pi.
Find the square root of your result.
Done! :)
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The lateral area of a cylinder with a radius of 3.5 and a height of 4 equals 87.96 units2
The surface area of a cylinder with a radius of 4 and a height of 17.4 is 537.84 square units.
The answer will depend on whether the larger cylinder is 4 times larger in terms of radius, cross-sectional area, or volume. If radius, multiply the smaller radius by 4. If cross-sectional area, multiply the smaller radius by 2. If volume, you do not have enough information.
113.10
75.4 units2