Three sections of fence need to be painted each section is made up of four equal sized boards alexs paints 1/6 of the fence bobby pins twice as much as alex charles paints only one board david paints the rest who paints the largest part of the fence

If you would like to know who paints the largest part of the fence, you can calculate this using the following steps:

three sections of the fence ... 3 sections
four equal sized boards ... 4 boards
3 * 4 = 12 boards

Alex: 1/6 of 12 boards = 1/6 * 12 = 2 boards
Bobby: twice as much as Alex = 2 * 2 boards = 4 boards
Charles: 1 board
David: 12 - 2 - 4 - 1 = 5 boards

Result: The largest part of the fence paints David (5 boards).

Idrk but i think u should figure out the n dia n then the units it will make it way more easier