SOLUTION: The circumference of a rectangle with sides a and b is 100 cm. If a is shortened by 5 cm and lengthened b by 6 cm, the surface area is reduced by 60 cm2. Calculate the lengths of

Question 1070052: The circumference of a rectangle with sides a and b is 100 cm. If a is shortened by 5 cm and lengthened b by 6 cm, the surface area is reduced by 60 cm2.
Calculate the lengths of sides a and b.
Found 2 solutions by ikleyn, josgarithmetic:
Answer by ikleyn(52781) (Show Source): You can put this solution on YOUR website!
.
A circumference of a rectangle is called "the perimeter" and is NEVER called "a circumference of a rectangle".

Also, rectangle HAS NO "surface area". It has "the area", in opposite and/or instead.

Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
That should be "perimeter" of the rectangle.

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, this area is reduced by 60 cm-squared.
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, substituted for a;

Finding a:

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