2. Find the areas of rectangles with the following pairs of monomials as their lengths and breadths respectively.
(p, q) ; (10m, 5n) ; (20x2, 5y2) ; (4x, 3x2) ; (3mn, 4np)
We know that the area of rectangle = Length x breadth.
(i) p × q = pq sq units
(ii)10m × 5n = 50mn sq units
(iii) 20x2 × 5y2 = 100x2 y2 sq units
(iv) 4x × 3×2 = 12×3 sq units
(v) 3mn × 4np = 12mn2 p sq units