exam Maths Puzzle Numerical Ability

WHICH OF THESE ARE IRRATIONAL NUMBERS 17/3,SQUARE ROOT OF 11, -1.82, OR 5.3WITH A LINE OVER THREE?

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exam Other Question

Simplify by taking roots of the numerator and the denominator.

3 sqrt (343x^14 / y^3)
3 is an exponent

Thank you for any help!!
Rita rode her bicycle out into the country at a speed of 20 mph and returned along the same route at 15 mph. If the round trip took 5 hours and 50 minutes, how far out did she ride?