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For statement of question 118, if the he...

For statement of question 118, if the heights of the two images are `h_(1)` and `h_(2)` , respectively,then the height of the object (h) is

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`H_(1)//H_(2)=(v_(0)^(2)sin^(2)theta)/(2g)div(v_(0)^(2)sin^(2)(90-theta))/(2g)=tan^(2)theta`
`rArrtheta=tan^(-1)sqrt((H_(1))/(H_(2)))=tan^(-1)[sqrt((3)/(9))]=.tan^(-1).(1)/(sqrt(3)=30^(@)`
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