Doubt in Kinematics

kinematics
moderate
equation-of-trajectory
doubt-regarding-solution
unsolved
pp
#1

Hi,
I have a doubt from HC Verma.


My line of thinking is as shown:

Please read this carefully and suggest whether I am right or wrong. (In the solution available online, they are using equation of trajectory —it is just not mentioned in H.C. Verma!)
Thanks in advance

#2

Is it not giving the correct answer ?
Prima Facie you seem right.
Only thing is in the last step it should be 110+x instead of 110-x

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#3

I gave this equation to an online equation calculator. I got the answer as 6.06!


Luckily I am right! The solution given in other places were involving complications.
Thanks for looking!

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