A kite is flying at the height of 7...

A kite is flying at the height of 75 m from the ground .The string makes an angle `theta` (where `cottheta=(8)/(15))` with the level ground .As - summing that there is no slack in the string the length of the string is equal to :

85 m / 85 मी

65 m / 65 मी

40 m / 40 मी

75 m / 75 मी

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The correct Answer is:

दिया है,
`cot theta = (8)/(15)`
`Delta ABC` में ,` cot theta = ( BC)/(AB)`

`implies (8)/(15) = ( BC)/(75)`
`implies BC = 40 m`
`therefore` डोरी की लम्बाई `= sqrt ( 75 ^(2) + 40 ^(2)) = 85 m`

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