The equilateral triangle system of planting accommodates how many more trees than square system?

Solution (By Examveda Team)

The equilateral triangle system of planting accommodates 15% more trees than the square system.
The equilateral triangle system accommodates 15% more plants than the square system. Plants are planted at the corner of an equilateral triangle. Six trees are planted making a hexagon. The seventh tree is planted in the centre and called septule. This system is generally followed where the land is costly and very fertile with ample provision of irrigation water.
In a square system, trees are planted on each comer of a square whatever may be the planting distance. This is the most commonly followed system and is very easy to layout. The central place between four trees may be advantageously used to raise short-lived filler trees.