increasing of length and breadth is proposional..length=6 which changes into 21 and breadth changes to 14..what was the previous value of breadth??

• Let previous breadth be "b"
  previous ratio of length : breadth ==> 6 : b
  
  let increased proportion be "x"
  new ratio is ==> 6x : bx ==> 21 : 14
  
  Length 6x = 21
  x = 21/6 => x = 7/2
  
  Breadth
  bx = 14
  b * 7/2 = 14
  b = 28/7 => 4
  
  Previous breadth = 4
  
  Ans : 4
• 10 years agoHelpfull: Yes(59) No(0)
• new ---> old
  21-----> 6
  14-----> ? = (14*6)/21=4. so old breadgh=4
• 10 years agoHelpfull: Yes(13) No(0)
• let the prev length be x
  
  so, prev length/prev breadth= new length/new breadth
  or, 6/x = 21/14
  or, x=14*6/21
  or, x=4 (ans)
• 10 years agoHelpfull: Yes(8) No(0)
• 6/x=21/14
  x=4
• 10 years agoHelpfull: Yes(2) No(0)
• Simple
  the proportions are same and breadth also increased by the same proportion as length
  Let us take the old breadth as x
  now we can express the prob as
  6/21 = X/14
  now x=4
• 10 years agoHelpfull: Yes(2) No(0)
• length(l) is directly proportional to breadth(b).
  so, l=kb
  or l1/b1=l2/b2 .........(i)
  where,
  l1=previous length, b1=previous breadth
  l2=previous length, b2=previous breadth
  here l1=6, b1=x(let),l2=21 and b2=14
  from (i),
  6/x=21/14 => x=4
  so previous breadth is 4.
• 9 years agoHelpfull: Yes(2) No(0)
• initiaaly len=6
  now len=21
  so len increased by 15
  which implies breadth decrease by 15
  now breadth=14
  so breadth=14+15
  answer is 29
  breadth=29
• 10 years agoHelpfull: Yes(1) No(8)
• 21/6=3.5
  ..
  14/3.5=4
• 10 years agoHelpfull: Yes(1) No(0)
• 6/x=21/14
  x=4
  previous breadth= 4
• 10 years agoHelpfull: Yes(1) No(0)
• b=4,6:b=21:14
  then cross multiply u get b=4
• 9 years agoHelpfull: Yes(1) No(0)
• length L=6=21
  breadth B=?=14
  
  21/14 = 3/2,
  3/2 = 6/?
  
  cut 6 by 3 half=2
  
  now multiply with 2, ie 2*2=4 ans
  
• 9 years agoHelpfull: Yes(0) No(0)
• L proportional B
  L1/L2=B1/B2
  6/21=B1/14
  B1=(6/21)×14
  B1=4
• 5 years agoHelpfull: Yes(0) No(0)
• 6*3.5=21
  So,6=21/3.5
  x*3.5=14
  So,x=4
• 3 years agoHelpfull: Yes(0) No(0)