Area = 4*pi*42 = 64pi square units
Fist you've got to find the volume of the sphere, if the radius was 4cm then it would be...4/3*pi*r3=268cm V of cylinder= pi*r2*l (the radius for example is 8cm) 268=pi*64*l L=268/64pi =1.3cm
To find the surface area of a sphere, the formula is: 4pi*r2So plug in numbers: 4pi(4)24pi(16)=64pi
Surface area of the sphere: 4*pi*42 = 201.062 square inches rounded to 3 decimal places
Area = 64pi implies that radius = 8 units So diameter = 2*rad = 16 units.
64pi (miles square)
The circumference of any circle = diameter*pi or 2*pi*radius
A = 64pi
From your question, we can't tell whether [ 64 pi ] is the area of the circleor the sector.The area of a circle is [ pi R2 ].If [ 64 pi ] is the area of the circle, then the radius is [ 8 ], and we don't careabout the sector.If [ 64 pi ] is the area of the sector, then the area of the full circle is [ 256 pi ](because the 90-degree sector is 1/4 of the circle), and the radius is [ 16 ].
Area of pizza: 64pi square inches.
The answer to your question is 8 cm diameter, increasing to 16 cm diameter: r2 squared = 4 x r1 squared and r2 = r1 + 4 r1 squared + 8r1 + 16 = 4r1 squared 3r1 squared - 8r1 - 16 = 0 Factors are (3r1 + 4)(r1 - 4), so original radius was 4cm (area 16pi) and increased radius is 8 cm (area 64pi).