exam Maths Puzzle Numerical Ability

g^2-g-12/g^2-10g+24 divided by g^2-9/g^2-7g+6

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exam Other Question

A patrol plane flies 220 miles per hour in still air. It carries fuel for 4 hours of safe flying. If it takes off on patrol against a wind of 20 miles per hour, how far can it fly and return safely? Simplify: 3/4/4/5
Possible Answers:
A. 16/15
B. 15/16
C. 5/3
D. 3/5
I am coming up with 3/80, since that is not one of the possible answers then I think I need some assistance.
Thanks