exam Maths Puzzle Numerical Ability

Find the dimensions of a rectangle whose length is 40 inches more than its width and whose perimeter is 300 inches.

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exam Other Question

The area of a triangle is 39 square feet. The length of one side is 1 foot more than twice the altitude to that side. Find the length of that side and the altitude to the side. i dont get any of it and i think i should chengeto regular 7th grade math instead in stead of skipping.