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?

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Jieep
Jieep Jieep
  • 19-11-2016
The building is 78 feet tall.
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nobillionaireNobley
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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