Question

10. A boy is standing on the ground and waving to his mother who is near the
window of their house which is exactly at half the height of their building. If the
angle of elevation of the top of the building is 70°, find the angle of elevation
of the window.

Answer 1

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QUESTION

A boy is standing on the ground and flying a kite with 75 m of string at an elevation of 45°.Another boy is standing on the roof of a 25 m high building and is flying his kite at an elevation of 30 °Both the boys are on opposite sides of the two kites. Find the length of the string that the second boy must have so that the two kites meet.

ANSWER

AC=> CDAC = 31

=>LetAC=x,CD=x 3

AE=AC+CE=x+2

sin45= 21

= ABAE

=> 75

x+25 = 2

=> x= 275 2

−50

=27.85m

=> AC=27.85m,CD=48.18m

AD= AC 2 +CD 2

=55.67m = lenght of string of second boy

solution

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Answer 2

Step-by-step explanation:

54° is the angle of elevation of the window.