the length of the rectangle is 8 cm is more than breadth. length is increased by 7cm and breadth is decreased by 4cm . but the area remain is same. find the length and breadth of rectangle.

• breadth=x,length=x+8.
  breadth=x-4,length=(x+8)+7
  both area's is same so Rectangle Area is=l*b
  
  x*(x+8)=(x-4)*(x+15)
  x=20 and x+8=28
  breadth x=20,length x+8=28.
• 10 years agoHelpfull: Yes(15) No(1)
• Breadth(B)=20
  Length(L)=28
  initially, L=8+B;
  A1=(8+B)*B;
  A2=(L+7)*(B-4);
  A1=A2
  (8+B)*B=(L+7)*(B-4)
  (8+B)*B=(8+B+7)*(B-4).... (SINCE:L=8+B)
  B=20;
  L=28;
• 10 years agoHelpfull: Yes(9) No(2)
• A) L=28,B=20
  Let length=l breadth=b;
  Given l=8+b,b=b
  Area =l*b=8b+b*b
  Then l increased by 7 and b decreased by 4
  Then l=(8+7+b),b=(b-4) area=(15+b)(b-4)
  Both having same area make them equate
  8b+b^2=b^2+11b-60;
  3b=60
  b=20;sub substitute in l=8+b;
  Therefore l=28
  
• 10 years agoHelpfull: Yes(1) No(0)
• length=28cm;
  breadth=20cm
• 10 years agoHelpfull: Yes(1) No(0)
• http://www.examfriend.in/Aptitude-test-Questions/Arithmetic-aptitude/Area/General%20Questions/2.html
• 9 years agoHelpfull: Yes(1) No(0)