Considering the earth as a plane having equation 5x + 9y - 10z + 138 = 0, a monument is standing vertically such th

### Question Asked by a Student from EXXAMM.com Team

Q 2015880760.     Considering the earth as a plane having equation
5x + 9y - 10z + 138 = 0, a monument is standing
vertically such that its peak is at the point
( 1, 2, -3 ). Find the height of the monument.
How can we save our monuments?

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