exam Maths Puzzle Numerical Ability

If I have an equilateral triangle with a hypotenuse of 82 cm, what is the length of the two equal sides?

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exam Other Question

the winner of a race ran the distance in 45s at an average speed of 9.6m/s. the runner who came in last finished in 48s what was the last runners average speed?

THX ALOT
the problem is 1.2x-3.5=x+1.7