Water flows through a cylindrical pipe of internal diameter 2 cm at a rate of…

2026

Water flows through a cylindrical pipe of internal diameter 2 cm at a rate of 6 cm per second into a cylindrical tank whose base radius is 100 cm. By how much will the water level rise in 15 minutes?

  1. A.

    46 cm

  2. B.

    50 cm

  3. C.

    54 cm

  4. D.

    62 cm

  5. E.

    0.54 cm

Attempted by 4 students.

Show answer & explanation

Correct answer: E

Calculate flow rate: Pipe radius (r) = 1 cm; flow rate = 6 cm/s. Volume flow per second = pi * r^2 * rate = pi * 1^2 * 6 = 6pi cm^3/s.

Calculate total time in seconds: 15 minutes = 15 * 60 = 900 seconds.

Total volume of water: 6pi * 900 = 5400pi cm^3.

Calculate tank base area: Tank radius (R) = 100 cm. Area = pi * R^2 = pi * 100^2 = 10,000pi cm^2.

Calculate rise in height (h): h = Volume / Area = 5400pi / 10,000pi = 0.54 cm.

Final Answer: 0.54 cm

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