The rafters of a gable roof make a slope of 30° with the horizontal. The peak of the roof is 1.5m high. Find the span of the roof

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The rafters of a gable roof make a slope of 30° with the horizontal. The peak of the roof is 1.5m high. Find the span of the roof

Guest Feb 25, 2015

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Best Answer

+128631

+5

We have

sin30 = 1.5 / h where h is the span of 1/2 of the roof

h = 1.5/sin 30 = 2m

We need to multiply this by 2 to get the span = 4 m

CPhill Feb 25, 2015

1⁺⁰ Answers

+128631

+5

Best Answer

We have

sin30 = 1.5 / h where h is the span of 1/2 of the roof

h = 1.5/sin 30 = 2m

We need to multiply this by 2 to get the span = 4 m

CPhill Feb 25, 2015

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