Plz ans que 1,2&4 Share with your friends Share 0 Shruti Tyagi answered this Dear Student, Question 1Area of rectangle=Length×BreadthGiven area=49a2b2-4x2=7ab2-2x2apply a2-b2=a-ba+bArea=7ab-2x7ab+2xSince area of rectangle=Length×BreadthHence Length=7ab-2x and breadth=7ab+2xQuestion 2Area of circle=πx4-10x2y2+25y4⇒πx22-2×5×x2y2+5y22apply a-b2=a2-2ab+b2⇒πx2-5y22As we know area of circle=πr2Hence comparing the two areaswe getπr2=πx2-5y22⇒r2=x2-5y22Hence radius r=x2-5y2 Regards, 0 View Full Answer