The two diagonal lines AC and BD of trapezoidal ABCD intersect at O. it is known that the area of triangle ABO and BCO are 10 and 15 respectively. What is the area of trapezoidal ABCD in square centimeter

The two diagonal lines AC and BD of trapezoidal ABCD intersect at O. it is known that the area of triangle ABO and BCO are 10 and 15 respectively. What is the area of trapezoidal ABCD in square centimeter

Triangle ABO CBO is equal height. Area ratio is 2:3, so Ao: OC = 2:3, so triangle AOB is similar to triangle doc. Area ratio is 2:3, area ratio is 4:9, so s triangle doc = 22.5, so the total is 10 + 15 + 15 + 22.5 = 62.5