急!懂英语和数学的来啊!The length and width of a rectangle are 12cm and
急!懂英语和数学的来啊! The length and width of a rectangle are 12cm and 5cm respectively. If the length is increased by 50% and the width is decreased by 20%. (a)Find the original area of the rectangle. (b)Find the new area of the rectangle. (c)Find the percentage increase in the area of the rectangle.