Question

who length of ladder is needed to reach a 7feet along the wall when the based of the ladder is 4feet from the wall​

Answer 1

Step-by-step explanation:

Then the length of the ladder will be...(x)

Applying Pythagoras Theorem

${x}^{2} = {7}^{2} + {4}^{2} \\ {x}^{2} = 49 + 16 \\ {x}^{2} = 65 \\ x = \sqrt{65} \\ x = 8 \: \: \: (approxiamately)$

Thus the required length of the ladder is 8.1m approx.

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