The area of a trapezium is 292.5 cm2 and the distance between its parallel sides is 15 cm. If one of the parallel sides is of length 30 cm, find the length of the other side.
Two circles with radii of 3 and 7 are drawn with the same center. The smaller inner circle is painted blue, and the part outside the smaller circle and inside the larger circle is painted orange. What is the ratio of the areas painted orange to the area painted blue?
From a point in the interior of an equilateral triangle, perpendiculars are drawn on the three sides. If the lengths of the perpendiculars are a,b, and c, find the area of the triangle.
Adesta and Adi sit on the 10-member board of directors for company P. If the board is to be split up into two 5-person subcommittees, what is the percentage that Adi and Adesta are included in the same sub-committee?