book Maths Puzzle Numerical Ability

I need to know the equation for the following:

Kathryn drove her rig 5 hours before dawn and 6 hours after dawn. If her average speed was 5 miles per hour more in the dark and s

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book Other Question
What is the area of an equiangular polygon with four sides equal to 1 and four sides equal to square root of 2? Please show the workings and the solution.
Thanks. Rationalize the denominator of each radical expression. Assume all variables represent nonnegative numbers and that no denominitors are 0.



1 + Square root 3
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3 Square root of 5 + 2 Square Root 3