exam Maths Puzzle Numerical Ability

2/a+1 +3 / 3/a+1 +4

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exam Other Question

Frank and Marie set sail from the same point. Frank is sailing in the direction S 6degrees E. Marie is sailing in the direction S 12 degrees W. After 11 hours, Marie was 9 miles Please help how do you solve t^2/3=4 thank you