exam Maths Puzzle Numerical Ability

square root of 1000x9y15

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exam Other Question

any idea what the solution of this worked is?

3x+4 / x + 1 + 6x + 5 / x + 1

thanks, I really need your help.
An automobile engine has four cylinder engine with each cylinder measured as follows: Bore:88mm Stroke: 71mm Find the engine displacement in cubic inches.