Question

How to solve 9 (I) from the attachment given below.. PLS help

Answer 1

Answer:

12.5m

Step-by-step explanation:

$by \: pythagoras \: theorem \\ {ab}^{2} + {ob}^{2 }= {ao}^{2}$

$therefore \: {ao}^{2} = {7.5}^{2} + {10}^{2}$

${ao}^{2}=156.25$

${ao}=12.5$