Easy
Find the volume of a cylinder with radius 21 cm and height 9 cm. (Use π = 22/7)
Explanation
Explanation
Volume of a cylinder = πr²h = (22/7) × 21² × 9 = (22/7) × 441 × 9 = 12474 cm³.
PRO TIP
Re-check your working by substituting the answer back into the original question.