Question

A ball point pen has innner radius of 2mm and length of 90mm. how many mm3 of ink will be needed to fill it?​

Answer 1

Step-by-step explanation:

volume of cylinder = πr²h

= 22/7 *2² * 90

= 22/7 * 4 * 90

= 3.14 * 360

= 1130.4 mm³

therefore 1130.4 mm³ of ink is needed