Question: two adjacent sides of a parallelogram are 30m and 14m?
Answer: The parallelogram is formed of two congruent triangles of sides 30 m x 14 m x 40 m. Area of triangle = [42x12x28x2]^0.5 = 28224^0.5 = 168 sq m. Hence area of the parallelogram = 2x168 = 336 sq m. Distance between one pair of parallel sides = 336/30 or 11.2 m and between the other pair = 336/14 = 24 m.