Math 9
posted by Jen .
A 6 m flagpole casts a 5 m shadow at the same
time of the day as a building casts a 28m
shadow. How tall is the building?
I drew out a flag and a building, with a shadow coming from the top to the ground. What do i do next?

Use proportions.
The height of the building can be x.
6/5=x/28
Cross multiply.
6*28=5x
168=5x
Divide each side by 5 so you isolate x.
168/5=x
168/5 = Simplify this to get your answer.
Respond to this Question
Similar Questions

CALCULUS
At 3:00 PM a man 144 cm tall casts a shadow 146 cm long. At the same time, a tall building nearby casts a shadow 171 m long. How tall is the building? 
trig
A 10m flagpole casts an 8m shadow at the same time of day as a building casts a 60m shadow. How tall is the building? 
Math(trig)
A 10m flagpole casts an 8m shadow at the same time of day as a building casts a 60m shadow. How tall is the building? 
math
A pole that is 2.9m tall casts a shadow that is 1.39m long. At the same time, a nearby building casts a shadow that is 36.75m long. How tall is the building. 
GEOMETRY
If a building casts a 20 ft shadow and a flagpole casts a 7 ft shadow and the flagpole is 12 ft tall, how high is the building? 
Prealgebra
A pole that is 3.1m tall casts a shadow that is 1.64m long. At the same time, a nearby building casts a shadow that is 50.25m long. How tall is the building? 
math
A 60–ft building casts a shadow that is 12 ft long. How tall is a building that casts a shadow of 17 ft at the same time of day? 
Math
In the diagram, a building casts a 20ft shadow and a flagpole casts a 7ft shadow. If the flagpole is 12 ft tall, how high is the building? 
Geometry
In the diagram, a building casts a 35ft shadow and a flagpole casts an 8ft shadow. If the flagpole is 18 ft tall, how tall is the building? 
math
At 3:00 PM a man 146 cm tall casts a shadow 136 cm long. At the same time, a tall building nearby casts a shadow 177 m long. How tall is the building?