Question

a ladder 28.86m long stands against a wall so the bottom is 3.3m away from the wall.how high up on the wall is its top?

Answer 1

heya 
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Length of ladder = 28.86 m 

Length of base   = 03.30 m 

H² = B²  + P² 

(28.86)² = (3.3)² + P²

P² = (28.86)² - (3.3)²

P² = 832.8996 - 10.89              
     
P² = 822.0096

P = 28.67 m 

Answer 2

This can be answered using pythagoras theorem
i. e base^2+ perpendicular^2= hypotenuse^2
3.3^2+height^2=28.86^2
height^2= 28.86^2-3.3^2
Height =28.67