Find total cost to build a robot. The cost of spare parts use to bulid it is in the ratio
4:5:3.
The cost of spare parts are $40, $50, $60.

• The total cost of robot is :$590
  
  The ratio of spare parts 4:5:3
  the cost of spare parts $40,$50,$60
  so the total cost is: (4*40)+(5*50)+(3*60)=$590
• 12 years agoHelpfull: Yes(23) No(3)
• answer $240
  
  let the cost of spare parts are 4x ,5x ,3x then total cost is 12 x.so total cost should be a multiple of 12
  
  2 units spare parts cost $40 = $80
  2 units spare parts cost $50 =$100
  1 unit spare parts cost $60 =$60
  
  total cost 240
  
• 12 years agoHelpfull: Yes(5) No(9)
• hai , krishnamurthy i have some doubts about your answer ,please try to clear me
  
  I think it is given that cost of spare parts is in the ratio 4:5:3 .
  
  in your answer cost are $160, $250,$180 .
  
  this is in the ratio 16:25:3 and not in 4:5:3
• 12 years agoHelpfull: Yes(2) No(0)
• the ans is $120
  
• 12 years agoHelpfull: Yes(1) No(0)