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| 1. |
From the top of a cliff 100 metre high, the angles of depression of the top and bottom of a tower are 45 and 60 respectively. The height of the tower is |
| A. | <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>100</center></td><td rowspan="2">(3 - <span style=" text-decoration: overline;">3</span>) metre</td></tr><td align="center">3</td></table> |
| B. | <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>100</center></td><td rowspan="2">( <span style=" text-decoration: overline;">3</span> - 1) metre</td></tr><td align="center">3</td></table> |
| C. | <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>100</center></td><td rowspan="2">(2 <span style=" text-decoration: overline;">3</span> - 1) metre</td></tr><td align="center">3</td></table> |
| D. | <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>100</center></td><td rowspan="2"> <span style=" text-decoration: overline;">3</span> - <span style=" text-decoration: overline;">2</span> metre</td></tr><td align="center">3</td></table> |
| Answer» B. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>100</center></td><td rowspan="2">( <span style=" text-decoration: overline;">3</span> - 1) metre</td></tr><td align="center">3</td></table> | |