## 4. A5 m long ladder when set against the wall of a house reaches to a height of 4.8 m. How far is the foot of the ladder from the

Question

4. A5 m long ladder when set against the wall of a house reaches to a height of 4.8 m. How far is the foot
of the ladder from the wall?​

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1 month 2021-08-14T05:54:19+00:00 1 Answer 2 views 0

\begin{gathered}{h}^{2} = {b}^{2} + {p}^{2} \\ {b}^{2} = {h}^{2} – {p}^{2} \\ = {5}^{2} – {4.8}^{2} \\ = 25 – 23.04 \\ = 1.96 \\ b = \sqrt{1.96} \\ = 1.4m\end{gathered}

h

2

=b

2

+p

2

b

2

=h

2

−p

2

=5

2

−4.8

2

=25−23.04

=1.96

b=

1.96

=1.4m