Question

Help with this question pls

Answer 1

Exact:
`4√(55)` m

Approximate: 29.7 m

Explanation:

`a^2+b^2=c^2`

`9^2+b^2=(31√(5) )^2`

`81+b^2=31^2(5)`

`b^2=961-81`

`b=√(880) =4√(55)`

`4√(55)` ≈ 29.7 m

Hope this helps!