or
or
Let x , the height of the broken tree from ground
Therefore broken part = hypotenous = 18 - x
Sin30° = x/(18 - x)
Or, 1/2 = x/(18 - x)
Or, 2x = 18 - x
Or, 3x = 18
Or, x = 6
Short cut:
Let, x=The height of the broken part
Sin30° = x/(18 - x)
=> 1/2 = x/(18 - x)
=> 2x = 18 - x
=> 3x = 18
=> x = 6
