1.

Q: If the angle of elevation of the Sun changes from 30 ° to 45 °, the length of the shadow of a pillar decreases by 20 meters. The height of the pillar is

A. 10 ( √3-1 ) m
B. 1 ( √3 + 1 ) m
C. 20 ( √3-1) m
D. 20 (√3 + 1) m
Answer» C. 20 ( √3-1) m


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