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Question

In a workshop, you need to fill a cylindrical tank with a liquid. The tank has a diameter of 1 meter and a height of 2 meters. Which method will give you the most accurate measurement of the tank's volume before filling it?

This question was previously asked in
RRB ALP 2025 CBT 2 Wiremen Question Paper (28-Jul-2026) (Shift 2)
The correct answer is

Calculate using the formula for the volume of a cylinder based on precise measurements

The accuracy of a volume calculation depends on using the formula that matches the true geometric shape of the container being measured.

The tank described is a cylinder, so its volume must be found with the cylinder formula, which relates volume to the base area and the height.

That formula is \(V=\pi r^2 h\), where the radius comes from the 1 metre diameter and \(h\) is the 2 metre height, both taken by careful measurement.

Applying it with precise measurements of diameter and height reproduces the tank's real capacity before any liquid is poured.

Using the cube formula assumes flat square sides the tank does not have, so it badly overstates the volume.

Treating it as a sphere assumes the wrong solid entirely, and judging by eye is only a rough guess, so all three give inaccurate results.

Hence, the answer is Calculate using the formula for the volume of a cylinder based on precise measurements.

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Similar Questions

  1. Find the total surface area of a closed cylinder having a base radius of 70 m and a height of 110 m. [Use π = \(22\over7\)]

  2. Which of the following is a geometrical figure with a three-dimensional geometry that has eight vertices and six rectangular faces?

  3. A solid metal sphere is melted and smaller spheres of equal radii are formed. 5% of the volume of the sphere is lost during the process. The smaller sphere has a radius that is one-tenth of the large sphere. If 14 liters of paint was needed to paint the larger sphere, how many liters is needed to paint all the smaller spheres?
  4. If two hemispheres of curved surface area \(8\pi \text{ cm}^2\) each are joined together to form a sphere. What is the volume of the sphere so formed in \(\text{cm}^3\)?
  5. A conical tent has a base radius of 14 m and a height of 48 m. How many cubic meters of air can it hold? (Use \(\pi\) = )

  6. The circumference of the base of a solid right circular cylinder is 88 cm and its height is 150 cm. What is the volume (in cm3) of the cylinder?

  7. A solid right circular cone is 7 cm high, and the radius of its base is 22.2 cm. It is melted and recast into a right circular cone with radius of its base 3.7 cm. Then the height (in cm) of the cone is ______.

  8. A plane parallel to the base divides a cone of height 40 cm into two parts. If the volumeof the upper smaller cone formed is \(\frac{1}{64}\) of the volume of the original cone, calculate the height of the plane from the base of the cone.

  9. If the volume of a cube is 3375 cm3, what is the length of one side?

  10. The total surface area of a cylinder is given by ________.


Important Questions from 3-D Mensuration

  1. Find the total surface area of a closed cylinder having a base radius of 70 m and a height of 110 m. [Use π = \(22\over7\)]

  2. Which of the following is a geometrical figure with a three-dimensional geometry that has eight vertices and six rectangular faces?

  3. The curved surface area of a cylinder is half of its total surface area. If its height is 195 cm, then find its diameter (in cm).
  4. The diameter of the base and slant height of a right circular cone are 30 cm and 113 cm, respectively. Find the volume (in cm³) of the given cone.
    (Use $\pi = \frac{22}{7}$)

  5. A cylindrical rod has an curved surface area of $4,900 \text{ cm}^2$. If the length of the rod is 97 cm, then the radius (in cm) of the rod, correct to two places of decimal, is:
    Take $\pi = \frac{22}{7}$
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