The angle of elevation of the top of a hill from a point is . After walking metres towards the top up a slope inclined at an angle to the horizon, the angle of elevation of the top becomes . Then, the height of the hill is |
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a) |
b) |
c) |
d) |

The angle of elevation of the top of a hill from a point is . After walking metres towards the top up a slope inclined at an angle to the horizon, the angle of elevation of the top becomes . Then, the height of the hill is |
|||||||

a) |
b) |
c) |
d) |

1 Answer

127 votes

**(a)**

In

Using sine rule in ,

Now, in ,

Total height,

127 votes

127