Kate wanted to buy 2 kgs of apples. The vendor kept the 2 kg weights on the right side and weighed 4 apples for that. She doubted on the correctness of balance and placed 2 kg weight on the left side and she could weigh 12 apples for 2 kgs. If the balance was correct how many apples she would have got

• let weight of the apple be "a". then intially it would be x+4a=2. when she weighed the equation would be x+2= 12a . solving both equations, a= 1/4.
  therefore for 2kg , no. of apples are 2/1/4 = 8 apples.
• 11 years agoHelpfull: Yes(28) No(11)
• i think answer is 9 apples.
• 11 years agoHelpfull: Yes(9) No(10)
• if ...left side wt=4apples+xkg(extra wt)
  right side wt=2kg
  =>4apples+xkg=2kg......(1)
  if..left side wt=xkg+2kg
  right side wt=12 apples
  =>x+2kg=12 apples .......(2)
  by subtracting 2 eq's
  4apples+xkg-(xkg+2kg)=2kg-12apples
  16apples=4kgs
  8apples=2kg...ans=8apples
  
  
  
  
• 11 years agoHelpfull: Yes(9) No(8)
• As she got less apples when the weight put on the right side, the left pan has more weight say w kgs.
  Now w + 4a = 2
  and w+ 2 = 14a
  Solving we get a = 2/9 Kgs.
  So she gets, 2/(2/9) = 9 apples
• 10 years agoHelpfull: Yes(7) No(6)
• 8 apples for 2 kg
• 11 years agoHelpfull: Yes(6) No(3)
• pls xplain it properly...what is x??
  
• 11 years agoHelpfull: Yes(2) No(3)
• =>4apples+xkg=2kg
  =>x+2kg=12 apples
  16apples=4kgs
  8apples=2kg...ans=8apples
• 10 years agoHelpfull: Yes(2) No(1)
• the ratio of weights should be the same...so 4a/2=2/12a ..so a=0.28 so ax=2 so x=7.14 ie 7
• 11 years agoHelpfull: Yes(1) No(5)
• As she got less apples when the weight put on the right side, the left pan has more weight say w kgs.
  Now w + 4a = 2
  and w+ 2 = 14a
  Solving we get a = 2/9 Kgs.
  weight of 1 apple is 2/9 kg
  for how many apples she will get 2kg ie2/2/9=9
  
• 9 years agoHelpfull: Yes(0) No(1)
• As she got less apples when the weight put on the right side, the left pan has more weight say w kgs.
  Now w + 4a = 2
  and w+ 2 = 14a
  Solving we get a = 2/9 Kgs.
  So she gets, 2/(2/9) = 9 apples
• 9 years agoHelpfull: Yes(0) No(1)
• As she got less apples when the weight put on the right side, the left pan has more weight say w kgs.
  Now w + 4a = 2
  and w+ 2 = 14a
  Solving we get a = 2/9 Kgs.
  So she gets, 2/(2/9) = 9 apples
• 8 years agoHelpfull: Yes(0) No(1)
• Let weight of the apple be "a".
  Then initially it would be x+4a=2.
  when she weighed the equation would be x+2= 12a .
  solving both equations, a= 1/4.
  therefore for 2kg , no. of apples are 2/(1/4) = 8 apples.
• 8 years agoHelpfull: Yes(0) No(0)
• left _side right_sid 2 kg 4 apple 1:2 14 apple 2 kg 7:1 (2+7=9 apple) another example left_side right_side 4kg 10apple 2:5 20apple 4kg 10:2 (5+10= 15 apple) (tricky questions.................)
• 8 years agoHelpfull: Yes(0) No(0)