Question

The portion of a student’s ballpoint pen that contains the ink is a cylinder with a diameter of 0.400 cm and a height of 11.5 cm. If the ink lasts 7 weeks, what is the volume of ink that the student uses each week?

Answer 1

Volume of all of the ink is (0.2^{2})* \pi  * 11,5 = 0.46 cm^{3} . When we divide the volume by 7, we get 0.0657142857 cm^{3} of ink