Question

3. Akite is flying with the string inclined at 30° to the horizontal The height of the kite above the ground
when the string 15mt long is
a) 15.

b) 30 m

c)1573 m​

Answer 1

GIVEN

( refer to the attachment for figure)

angle of elevation of kite = 30°

length of string at an instant = 15 m

TO FIND

the height of kite above the ground at that instant = ?

SOLUTION

In the figure

sin 30° = AB / AC

1 / 2 = x / 15

x = 15 / 2

x = 7. 5 m

Hence the height of kite will be 7.5 m