### Brain Teasers

# Guttering

Fun: (2.3)
Difficulty: (1.44)
Puzzle ID: #8669

Submitted By: glennyboy02 Corrected By: grilledcheese

Submitted By: glennyboy02 Corrected By: grilledcheese

Math
Math brain teasers require computations to solve.

Glenn needs to repair the guttering on his house. His house is 7.2 metres high, and he places the ladder 1.8 metres from the base of the wall of the house. The ladder stretches 1 metre over the roof. What is the length of the ladder, rounded off to two decimal places?

### Hint

Try drawing a diagram.### Answer

Use the Pythagorean Theorem.where L = ladder length

L = (square root (7.2m squared + 1.8 m squared)) + 1m

L = (square root (55.08m)) + 1m

L = 7.42m + 1m

Therefore, the length of the ladder is approximately 8.42 metres.

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