The length of a rectangle is 15 cm and its breadth is 10 cm. When the length is increased to 25 cm, what will be the breadth (in m) of the rectangle if the area remains the same?

Area topics are: Area of rectangles, squares, triangles, quadrilaterals, polygons, and circles.

Here are some area formulas for quantitative aptitude:
Rectangle: Area = (length x breadth)
Square: Area = (side)2 = (diagonal)2
Triangle: Area = x base x height
Parallelogram: Area = (base x height)
Circle: Area = R2, where R is the radius
Trapezoid: Area = 1⁄2 × (base + base) × height
Room walls: Area = 2 (length + breadth) x height
Circumference of a semi-circle: Circumference = R