sandyo7jejasia sandyo7jejasia

19-11-2016
Mathematics

contestada

If a 36-foot tree casts a 28-foot shadow at the same time near by building casts a 70-foot shadow, how tall is the building?

Respuesta :

19-11-2016

The building is 78 feet tall.

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nobillionaireNobley nobillionaireNobley

21-11-2016

actual length / shadow ratio is equal
Let the height of the building be x, then
36/28 = x/70
x = (36 x 70)/28 = 2,520/28 = 90.

Therefore, the height of the building is 90 feet.

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