exam Maths Puzzle Numerical Ability

please help.find the length and width of rectangle ABCD . Toop left A top right D bottom left B bottom right C .between B and C is P=140 cm. between D and C is x.Thanks for helpin

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exam Other Question

Hi,

Will someone please help me with a simple interest problem? I know that the formula for simple interest is I=Prt, but how do I solve a problem that still leaves 2 variables If f(x)=3x 2nd power+2, then what is f(a+b)?