 የክበቡ አካባቢ በእኩል ፔሪሜትር ሁኔታ ውስጥ ትልቁ ስለሆነ ፣ የበለጠ ፈሳሽ በክብ ቱቦ ሊጓጓዝ ይችላል።
Since the area of   the circle is the largest under the condition of equal circumference, more fluid can be transported by the circular tube.