Mathematics · Time and Work
If pipe A can fill a cistern in X hours, pipe B can fill the same cistern in Y hours, and pipe C can empty the full cistern in Z hours, then find the time taken to completely fill the cistern if pipes A, B, and C are opened together.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1XYZYZ - XZ - XY
- 2XYZYZ + XZ + XY
- 3XYZYZ + XZ - XY✓
- 4XYZYZ - XZ + XY
Correct answer
XYZYZ + XZ - XY
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