Sat February 02, 2013 By:

I am not able to understand the last 2 steps of the following question .

Expert Reply
Sat February 02, 2013
Answer : the last two steps where the time taken to cross distance C to  D is given by 2AB/31/2
therefore , the value of AB (which must be given in the question as the height of the tower) and we get the value of time as 6 seconds , 
similarily in the last step, the value of DB is obtained in eq 1 , corresponding to which we have put the value of AB and time is 3 seconds.
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