Question

a 5 metre long ladder when set against the wall of a house reaches a height of 4.8. how far is the foot of the ladder from the wall.​

Answer 1

Answer:

1.4 m

Step-by-step explanation:

h^2 = b^2+p^2

b^2=h^2-p^2

b^2=5^2 - 4.8^2

b^2=25 - 23.04

b^2 =1.96

   b=  root 1.96

   b= 1.4 m  

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Answer 2

Answer:

by Pythagoras theorem

${(bc)}^{2} = {(ac)}^{2} - {(ab)}^{2} \\ \: \: \: \: \: \: = {5}^{2} - {4.8 }^{2} \\ \: \: \: \: \: \: \: \: \: \: = 25 - 23.04 = 1.96 \\ bc = \sqrt{1.96} =1.4$