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natulia [17]
3 years ago
13

A wooden board is leaning against a house

Mathematics
1 answer:
kobusy [5.1K]3 years ago
6 0

Answer:

24.4 feet

Explanation:

Let x be the length of the wooden board as shown in the diagram.

Using trigonometry ratio, we can write

\cos(35)=\frac{20}{x}

\implies0.819= \frac{20}{x}

cross multiplying we get:

0.819 \times x = 20

Diving through by 0.819, we obtain

x = 24.42

To the nearest tenth, x=24.4 feet.

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