7 pillars are used to hold a slant iron ladder as shown in the figure. If the distance between every two pillars is 1 m and height of the last piller is 10.5 m. Find the height of pillar.
Given, Distance between every two pillars = 1 m
Height of the last pillar = 10.5 m
Number of pillars used to hold a slant iron ladder = 7
Distance between the tip of ladder on floor to the last pillar = 7
1 = 7 cm
Height of last pillar = 10.5 cm
Formula Used:
Pythagoras Theorem: 
⇒
Length of slant ladder = 
= 
= 
= 12.619 cm (ans)
7