Gre flash card 5-6

GRE Quant Problem Solving
1

I am not able to get the approach and answer.

problem 1
problem 11600×1200 218 KB

problem 2
problem 21600×1200 158 KB

problem 3
problem 31600×1200 155 KB

2

Please check the solutions video for this problem:

https://www.gregmat.com/quizzes/quiz-data

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