exam Maths Puzzle Numerical Ability

A car, after wandering 2/3 of the road, has to wander 8 km to arrive at 5/6 of this distance . What is the the lenth of this road ? HELPPPPPPP !!!!!!!

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A service station wishes to mix 40 L of a 78% antifreeze solution. How many litres of a 75% solution and a 90% solution should be used in forming the mixture? ( using two unknowns, write two equations and solve.) i was wondereing if there were any lessons on your website that shows the following problem: Factoring axsquared+bx+c. I need all the help i can get. thanks.