exam Maths Puzzle Numerical Ability

a wire is bent in the form of a quadrant of a circle of diameter 1.4m. find the length of the wire, if the quadrant is bounded by the radii of the circle.

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exam Other Question

7. Use dimensional analysis to convert 60miles per hour to feet per second. Remember that there are 5280 feet in 1 mile. Divide: 5x^3-5x+1 by x-3

I tried factoring out the 5 and ended up with 5(x^2-x-3)+x as the answer
Am I anywhere close?????