Q: What is the surface area of a sphere with the radius of 3.5?

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Surface Area = ~4,712.4 ft2

A circle with a radius of 35 feet has an area of 3,848.45 square feet.

Area of a circle = pi*radius squared

About 3,848.45 square units.

Different things have different shapes, so you can't use the same technique on everything. Measure the surface area of a cube is not done the same way as measuring the surface area of a sphere, and measuring the surface area of an irregularly shaped object is another matter entirely. In the simplest case, which is a rectangle, you simply multiply the length by the width. 5 inches x 7 inches = 35 square inches.

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Surface Area = ~4,712.4 ft2

The radius of a circle with an area of 35 mm squared is 3.34mm

A circle with a radius of 35 feet has an area of 3,848.45 square feet.

Area of a circle = pi*radius squared

The radius of a circle with an area of 35 square inches is 3.34 inches.

The volume of a sphere is 4/3 x pi x r^3 The area is the derivative of the volume.... i.e. 4 x pi x r^2 so you need to calculate: 4 x 3.14159 x 35^2

r = ~3.34 units.

About 3,848.45 square units.

A circle with a radius of 35 cm has an area of 3,848.45 square cm.

A sphere of radius R and charge Q has a potential of V = kQ/R. This means that: Csphere = Q/V = 4π(eps)R

radius = 35/(2*pi) in cm

Different things have different shapes, so you can't use the same technique on everything. Measure the surface area of a cube is not done the same way as measuring the surface area of a sphere, and measuring the surface area of an irregularly shaped object is another matter entirely. In the simplest case, which is a rectangle, you simply multiply the length by the width. 5 inches x 7 inches = 35 square inches.