(b) 360
(c) 300
(d) none of these
6. A pole 14 m high casts a shadow of 10 m. At the same time, what will be the height of a tree,
the length of whose shadow is 7 metres?
(a) 20 m
(b) 9.8 m
(c) 5 m
(d) none of these
Answers
Answered by
0
Answer:
d
Explanation:
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Answered by
0
Answer:
Explanation:
The angles are same because sun rays will strike parallely to the pole and the tree.
so, by pythogoras theorem hypotenuse created by shadow and pole
= root of 14^2+ 10^2
= root of 196+100
= root 296
= 17.2=172/10 = hypotenuse
cos theta = 10 divided by 172/10
= 10 x 10/172
= 100/172
= 0.58 = ~3/5
the triad is 3,4and 5.
hence angle = 37 degrees.
tree height is base times =
7 times tan 37= 7x 3/4=21/4=5.25m
unless it says round to nearest real number ans: is d
but if you round it ans: is c.
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