book Maths Puzzle Numerical Ability

Find the distance between the points (3,17) and (-2,5)

a: 13
b: sq. rt. of 145
c: sq. rt. of 458
d: 3 sq rt. of 51
e: none of these

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book Other Question

On a canoe trip Rita paddled upstream (against the current) at an average speed of 2 mi/h relative to the riverbank. On the return trip downstream (with the current) her average sp what is the answer to this problem:7-3(4+2*-9)