Zinc in 2 kg of new alloy = (5/13 + 5/8) = 105/104 kg
copper in 2 kg of new alloy = (8/13 + 3/8) = 103/104 kg
Ratio of zinc and copper in new alloy = 105/104 : 103/104 = 105:103
hope this example helps.....
An alloy contains zinc and copper in the ratio 7:9. Find the weight of copper if it has 31:5 kg of zinc
2 answers
I think you have a typo.
31:5 kg is not a unit of weight, did you mean 31.5 kg?
If so, then just use a ratio ....
zinc/31.5 = 7/9
9zinc = 220.5
zinc = 220.5/9 = 24.5 kg
notice :
24.5 : 31.5 = 245 : 315 = 7 : 9
31:5 kg is not a unit of weight, did you mean 31.5 kg?
If so, then just use a ratio ....
zinc/31.5 = 7/9
9zinc = 220.5
zinc = 220.5/9 = 24.5 kg
notice :
24.5 : 31.5 = 245 : 315 = 7 : 9