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29.7cm by 21cm
A = 1385cm2
A = 1,385.4 cm2
A = 346.36 cm2
Area of the base of a cylinder = pi*radius2
29.7cm by 21cm
A = 1385cm2
Approx 29.7cm x 21cm
area of a circle and the question is d=21cm
A = 1,385.4 cm2
A = 346.36 cm2
Yeah, its 21cm x 29.7cm
Area of the base of a cylinder = pi*radius2
The area of a circle is calculated using the formula A = πr^2, where A is the area, π is a constant approximately equal to 3.14159, and r is the radius of the circle. Plugging in the radius of 21cm into the formula, we get A = 3.14159 x (21)^2 = 1385.44 square centimeters. Therefore, the area of a circle with a radius of 21cm is 1385.44 square centimeters.
The surface area of a box 15cm x 12cm x 8 cm is 2 times 15cm times 12cm, plus 2 times 15cm times 8 cm, plus 2 time 12cm times 8 cm, or 792cm2. However, this is only the surface area - the actual wrapping paper required would depend on the method of wrapping and how much overlap is desired. Since you would not want to splice the paper, you certainly would need more that 792cm2 but, again, that depends on your wrapping style.
The surface area of a cylinder where height is 80cm and radius is 15cm equals 8953.54cm2
15cm 12cm