1)Average cost of 4 apples and 5 mangoes is Rs. 30. The average cost of 8 apples and 7 mangoes is Rs. 40. Find the total cost of 24 apples and 24 mangoes.

• avg cost of 4 apples and 5 mangoes , 4+5=9 --> 9*30=270
  avg cost of 8 apples and 7 mangoes, 8+7=15 -->15*40=600
  
  Total cost for 12 apples and 12 mangoes, 270+600=870.
  now, for 24 apples and 24 mangoes = 2*870= 1740 is answer.
• 10 years agoHelpfull: Yes(23) No(2)
• cost of 12 apples and 12 mangoes= 40 +30=70
  cost of 24 apples and 24 mangoes= 2*70=140
• 10 years agoHelpfull: Yes(15) No(7)
• average cost of 8 apples+7 mangoes=40
  average cost of 4 apples+5 mangoes=30
  solving this,
  average cost of 12 Apples+12 Mangoes=(30+40)/2=35
  hence avg cost of 24 mangoes + 24 apples = 35
  Total cost = 48*35=1680
• 10 years agoHelpfull: Yes(3) No(1)
• Given cost is average not total. and we have to find out total cost.
  let price of one apple is X, and for mangoes is Y.
  equation will be
  (4X+5Y)/9 = 30 (here divided by 9 by virtue of total no. of apple and mangoes
  are 4+5 = 9)
  same second eq. will be
  (8X+7Y)/15 = 40 (here divided by 15 because 8+7 = 15).
  
  so two equations are
  4X+5Y = 270......(1)
  8X+7Y = 600......(2)
  after solving
  X=17.5 (cost of one apple)
  Y=20
  
• 10 years agoHelpfull: Yes(2) No(2)
• 4A+5M=60 - 8A+10M=120
  8A+7M=80 8A+ 7M=80
  On solving A=4/3,m=40/3
  now 24M+24A=24x(4/3)+24x(40/3)=32+320=352
• 10 years agoHelpfull: Yes(1) No(6)
• 4a+5m=30 => 8a+10m=60 ......(1)
  8a+7m=40 => 16a+14m=80 .....(2)
  add (1) & (2)
  24a+24m=60+80=140
• 10 years agoHelpfull: Yes(1) No(2)
• ans is 140
  
  let no. of apples be 'a' and no. of mangoes be 'm'
  4a+5m=30....eq 1
  8a+7m=40...eq 2
  multiply eq 1 by 2 we get 8a+10m=60
  subtract eq 1 from eq 2.
  we get m=20/3 and a=-5/6
  put it in 24a+24m.. we get 140
• 10 years agoHelpfull: Yes(1) No(0)
• avg cost of 4 apples and 5 mangoes , 4+5=9 --> 9*30=270
  avg cost of 8 apples and 7 mangoes, 8+7=15 -->15*40=600
  Total cost for 12 apples and 12 mangoes, 270+600=870.
  now, for 24 apples and 24 mangoes = 2*870= 1740 is answer.
• 9 years agoHelpfull: Yes(1) No(0)
• mahendra nikhade uh know the answer?
• 10 years agoHelpfull: Yes(0) No(0)
• sorry before finishing it has submitted.
  so
  X=17.5(cost of one apple)
  Y=20(cost of one mango)
  
  cost of 24 apple = 17.5*24= 420
  cost of 24 mangoes 20*24=480
  
  so total cost = 420 + 480 = 900 Rs. ..........ANS.
• 10 years agoHelpfull: Yes(0) No(3)
• there again calculation mistake.
  Y = 40.
  so 24*40 = 960.
  so ans became 420+960= 1380............ANS.
  apologize for mistakes.
• 10 years agoHelpfull: Yes(0) No(2)
• ans is 1740
• 10 years agoHelpfull: Yes(0) No(0)
• ans is 2088
  
• 10 years agoHelpfull: Yes(0) No(0)
• 4A+5M=270
  8A+7M=600
  12A+12M=870
  24A+24M=1740
• 10 years agoHelpfull: Yes(0) No(0)
• the cost of 4 apples and 5 mangos =30
  8 apples and 7 mangos =40
  12 apples and 12 mangos=70
  24 apples and 24 mangos =140
• 9 years agoHelpfull: Yes(0) No(0)
• average cost of 4 A & 5 M =30
  then total cost = 30*9=270
  average cost of 8 A & 7 M =40
  then total cost =40*15=600
  total cost of 12 A & 12 M=270+600=870
  total cost of 24 A & 24 M=870*2=1740
  
  
• 9 years agoHelpfull: Yes(0) No(0)
• 4x+5y=30, 8x+7y=40; 3y=20 ; 24y=160
• 9 years agoHelpfull: Yes(0) No(0)
• 1apple=rs.6.67 and 1 mango=rs -0.833 so
  (24*6.67)+(24*(-0.833))=140
• 9 years agoHelpfull: Yes(0) No(0)
• 4 apples+5 mangoes=9 fruits
  cost= 9*30=270 Rs
  8 apples+ 7 mangoes=15 fruits
  cost=15*40=600 Rs
  Total fruits=9+15=24
  total cost for 24 fruits=270+600=870 Rs
  For 24 apples and 24 mangoes cost will be
  2*870=1740 Rs
• 9 years agoHelpfull: Yes(0) No(0)
• TAKE TWO SOLUTIONS
  4X+5Y=30,8X+7Y=40 SOLVE WE GET X ,Y
  y=6.66,x=15.825 for an apple and a mangoo
  for 24 apples=379.8rs.for 24 mangoe =159.8rs
  total=540 rs
• 9 years agoHelpfull: Yes(0) No(0)
• Ans is:1740
  (4 apples+5 mangoes)/9=30 4 apples+5 mangoes=270 (I)
  (8 apples+7 mangoes)/15=40 8 apples+7 mangoes=600 (II)
  solving I & II we get
  apple = 92.5 & mangoe = -20
  then 24 apples+24 mangoes=24*92.5 + 24 *(-20)=1740
• 8 years agoHelpfull: Yes(0) No(0)
• total cost of 12 apple and 12 mangoe=270+600=870
  so total cost of 24 apple and 24 mangoes =870*2=1740
• 8 years agoHelpfull: Yes(0) No(0)