How far up will a 15 meters ladder reach, if the foot of the later must be 9 meters from the base of the wall

12

It is a common Right triangle side - 9-12-15. its the same as a 3-4-5 triangle

Answer: 12

Step-by-step explanation:

15 is the hypotenuse (c), and 9 is one side (a)

a^2+b^2=c^2

1. Find Values of Squared Numbers: 81+b^2=225

2. Subtract 81 from 225: b^2=144

3. Find the square root of each side: b=12