A cone has a radius of 3 cm and a height of 4 cm. What is the volume of the cone

Practice Questions

Q1
A cone has a radius of 3 cm and a height of 4 cm. What is the volume of the cone?
  1. 12 cm³
  2. 36 cm³
  3. 24 cm³
  4. 18 cm³

Questions & Step-by-Step Solutions

A cone has a radius of 3 cm and a height of 4 cm. What is the volume of the cone?
  • Step 1: Identify the formula for the volume of a cone, which is Volume = (1/3)πr²h.
  • Step 2: Plug in the values for the radius (r) and height (h). Here, r = 3 cm and h = 4 cm.
  • Step 3: Calculate r² (the radius squared). So, 3² = 9.
  • Step 4: Now substitute r² into the formula: Volume = (1/3)π * 9 * 4.
  • Step 5: Multiply 9 by 4 to get 36. So now we have Volume = (1/3)π * 36.
  • Step 6: Calculate (1/3) * 36, which equals 12. So now we have Volume = 12π.
  • Step 7: Use the approximate value of π (3.14) to find the volume. Multiply 12 by 3.14.
  • Step 8: Calculate 12 * 3.14 to get 37.68 cm³.
  • Volume of a Cone – The formula for the volume of a cone is V = (1/3)πr²h, where r is the radius and h is the height.
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