Point A is in between points B and C. The distances of B and C from point A are 1000m and 2000m respectively. Measured from point A, the angle of elevation of point B is 18deg30’ while that of C is 8deg15’. Find the difference in elevation between B and C considering effects of curvature and refraction. a. 44.4 m b. 32.21 m c. 46.43 m d. 42.14 m

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