1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution I solved this problem and got the correct answer 108 m . But I had to solve a DE . This question is from a test where we get around 1 minute to solve a problem . I took half an hour to solve it . It looks like a subjective type problem . I am just curious as to whether there is a quicker/smarter way to find one of the options .