Question: 3 2 . A 9 m triangulation observation tower is to be constructed on top of hill B ( located between points A and c

32. A 9 m triangulation observation tower is to be constructed on top of hill B (located between points A and c)whose elevation abovesea level is 610 m. What would betowers to be construcied at hill A and c, located 18 kmand 20 km from B respectively in orderthat the towers A, B and C will be intervisible?Elevation A is 650 m and Elevation C is 590 m.

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