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1. |
The height of a tower is 100 m. When the angle of elevation of the sun changes from 30° to 45°, the shadow of the tower becomes x metres less. The value of x is |
A. | $100\,m$$ |
B. | $100\sqrt 3 \,m$$ |
C. | $100\left( {\sqrt 3- 1} \right)\,m$$ |
D. | $\frac{{100}}{{\sqrt 3 }}\,m$$ |
Answer» D. $\frac{{100}}{{\sqrt 3 }}\,m$$ | |