Math, asked by SanyamSaini4312, 1 year ago

A cube whose edge is 20 cm long has a circle of largest diameter on each of its faces painted black. what is the total are of the unpainted surface of the cube

Answers

Answered by Avm2
33
Area of one face of cube_20²=400cm²
Diameter_20cm then radius_10cm
area of one circle on one face on cube_πr²
area_3.14×10×10
_314cm²
Total faces of cube_6
then total area_6×400=2400--------------------(1)
Total number of circles_6
then total area of circles_6×314=1884--------(2)
unpainted area_(1)-(2)
_2400-1884=516cm
So total area of unpainted part is 516cm²..
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Answered by vadana9000
3

Answer:

area of cube side square 20 into 400 CM square then area of circle Pi R Square is equal to 22 upon 7 into 10 into 10 the diameter of circle is 24 the radius is 10 the area of a circle is 340 cm and area of cube is 400 CM square the number of the number of cubes is total 6 so the area of two surfaces of cubes 6 into 400 is equal to 2400 the number of circles is 6 so the total surface area of circle is 1883 so tract the area of cube minus area of circle answer is 516 CM square

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