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 |
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a) |
b) |
c) |
d) |
(a)
In
Using sine rule in ,
Now, in ,
Total height,