I need to find volume of a compact disc with radius of 60mm, diameter of 120mm and height of 1.2mm Volume = (ð x r2) x H V= 3.141592 X120 X 1.2 452.16 rounded to 452 Is my answer right?
Answer is 135.648 sq. cm
ie =3.14*60*60*1.2 sq mm
Check your formula it should be Rsquared not R2 (60x60) not 2X60
Yes, your answer is correct. The volume of a compact disc can be calculated using the formula V = π x r^2 x h, where r is the radius and h is the height. Plugging in the values from your question: V = 3.141592 x 60^2 x 1.2 = 3.141592 x 3600 x 1.2 = 13578.8 mm^3. Rounded to the nearest whole number, the volume is 13579 mm^3, which is approximately 452 cubic centimeters.
To find the volume of a compact disc, you can use the formula V = (π x r^2) x h, where V is the volume, π is a mathematical constant approximately equal to 3.141592, r is the radius of the disc, and h is the height of the disc.
Given that the radius (r) of the compact disc is 60mm and the height (h) is 1.2mm, we can substitute these values into the formula:
V = (3.141592 x 60^2) x 1.2
= (3.141592 x 3600) x 1.2
= 11309.7328 mm^3
However, it seems you made a mistake in your calculation. The correct calculation should be:
V = (π x 60^2) x 1.2
= (3.141592 x 3600) x 1.2
= 13572.7459 mm^3
So, the correct answer for the volume of the compact disc is approximately 13572.7459 mm^3, not 452 mm^3.