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Sagot :
Answer:
Step-by-step explanation:
The ladder forms a right angled triangle with the rock so we can make use of the pythagoras theorem.
Where;
Hypotenuse = length of the ladder = 10ft
Adjacent= horizontal distance on the ground= 5ft
Hence;
H^2 = O^2 + A^2
10^2= O^2 + 5^2
100= O^2 + 25
O^2 = 100 - 25
O = _/75 = 8.660
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