Multiple choice

If the volume of a cylinder is 385 cubic cm and height is 10 cm, find its radius?

  1. 7 cm

  2. 10.5 cm

  3. 3.5 cm

  4. 1.75 cm
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The volume of a cylinder is V = pi * r^2 * h. Given V = 385 and h = 10, we have 385 = (22/7) * r^2 * 10. Solving for r^2 gives r^2 = (385 * 7) / 220 = 12.25. Taking the square root, r = 3.5 cm.

AI explanation

Using the volume of a cylinder formula, V = pi * r^2 * h. Substitute the given values to get 385 = (22/7) * r^2 * 10. Simplifying this gives r^2 = 385 * 7 / 220 = 49 / 4. Taking the square root of 49 / 4 gives the radius of 3.5 cm.

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