Posted by **Nada** on Tuesday, July 20, 2010 at 6:44pm.

The Pont du Gard near Nimes, France is a roman aqueduct. An observer in a hot air balloon some distance away from the aqueduct determines that the angle of depression to each end is 54 degrees and 71 degrees respectively the horizontal distance between the balloon and aqueduct is 270.0 m. Calculate the length of the aqueduct to the nearest thenth of a metre.

- Sine, cosine law -
**Reiny**, Tuesday, July 20, 2010 at 7:02pm
I noticed you posted the same question before.

I cannot reconcile your data with a diagram I am attempting.

Your call of angles of depression suggests the balloon is above the aqua-duct, but then you give the horizontal distance between the balloon and the aqua-duct.

Is the balloon in a plane parallel to the plane of the bridge and the distance between those planes is 270 ?

Are we working in 3 separate planes in 3D ?

- Sine, cosine law -
**Nada**, Tuesday, July 20, 2010 at 7:39pm
I'm not sure if it is parllel, it dosent have a diagram so it got me confused! But I know it is not in 3D, the answer in the txtbook is 299.7m, I just need the method to get it

## Answer this Question

## Related Questions

- Mathh - The Pont du Gard near Nimes, France is a roman aqueduct. An observer in ...
- durham college - the pont du gard near Nimes,france, is a roman aqueduct.an ...
- Math grade 11 - An observer in a hot air balloon some distance away from the ...
- Calculating distance(law of cosines) - Observers P and Q are located on the side...
- French - SraJMcGin/Frenchy - Que remarquex-vous interessant dans tableau .....
- pre cal - Tamara is flying in a hot air balloon. The hot air balloon is flying ...
- physics - There are many ropes keeping a hot air balloon from floating away ...
- pre cal - Tamara is flying in a hot air balloon. The hot air balloons is flying ...
- Algebra2--- - 1. An artist is designing triangular mirrors. Determine the number...
- Algebra 2 .. - 1. An artist is designing triangular mirrors. Determine the ...