a whistle
The width is 16 feet and the length is 20 feet and so 16*20 = 320 square feet
The width is 16 feet
Five yards and fifteen feet are the same length.
Perimeter = 2*(Width + Length) So 40 = 2*(8 + Length) 20 = 8 + Length Length = 12.
Sound signaling device
Multiply boat length (in feet) by boat width (in feet), then divide by 15.
18 Feet
single-hull boats less than 20 feet in length
18 Feet
A signal sound device
Whether or not the boat has adequate guards or a railing
a whistle
12 years of age and under on a 19 foot boat or less.
When referring to boating, PWC stands for personal watercraft. The definition of PWC is a boat less that 16 feet in length, that is powered by jet pumps instead of propellers.
Boat cover sizes are measured by how many feet your boat is. The average boat size is probably less than 20 feet. Boat covers generally come in a universal size that fits several different size boats. For example a cover can come in 17 to 19 feet or 20 to 22 feet.
Its width is 13 feet and 13*19 = 247 square feet