Because without mechanical means of helping to pushing the air, the pressure under even short depths of water render it impossible for a person to breath in or out through it anyways.
The longer the snorkel the harder it is - presuming you would swim at a greater depth - to draw air through it. A consideration would also be the difficulty of handling an undoubtedly unwieldy tube at longer lengths.
The length of a radius is not the length of a diameter. The diameter is two times the length of the radius.
the diameter is the length. the diameter means the length of across the circle. it means the longest length across the circle. the radius is halfthe diameter
The length of a radius is half the length of a diameter.
50 diameter to length
Most snorkels are around 12 to 18 inches long, but some can be shorter or longer depending on the brand and design. It's important to choose a snorkel length that feels comfortable for you while swimming and diving.
The length of the diameter is always twice the length of the radius.
The length of a radius of a circle is half of the diameter of the same circle. So, diameter is always twice the radius.
The width, or the length of a circle are its diameter.
snorkel
The radius is excatly half of the diameter
I get 9