Question : In two alloys, the ratio of Aluminium to Zinc is 5 : 6 and 3 : 5. If 242 kg of the first alloy and 144 kg of the second alloy are mixed, then the ratio of Aluminium and Zinc in the new alloy will be:
Option 1: 76 : 117
Option 2: 82 : 111
Option 3: 93 : 100
Option 4: 68 : 125
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Correct Answer: 82 : 111
Solution : Given: The ratio of Aluminium to Zinc in two alloys is $5: 6$ and $3: 5$. 242 kg of the first alloy to be taken. Aluminium in the first alloy = $\frac{5}{5+6}×242=110$ kg Zinc in the first alloy = $\frac{6}{5+6}×242=132$ kg 144 kg of the second alloy to be taken. Aluminium in the second alloy = $\frac{3}{3+5}×144=54$ kg Zinc in the second alloy = $\frac{5}{3+5}×144=90$ kg The ratio of Aluminium and Zinc in the new alloy = (110 + 54) : (132 + 90) = 164 : 222 = 82 : 111 So, the ratio of Aluminium and Zinc in the new alloy will be 82 : 111. Hence, the correct answer is 82 : 111.
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Question : Two alloys consist of copper and tin. The copper-to-tin ratio in the first alloy is 1 : 3, and in the second alloy, it is 2 : 5. What ratio should the two alloys be mixed in to create a new alloy with a tin-to-copper ratio of 8 : 3?
Option 1: 3 : 5
Option 2: 4 : 7
Option 3: 3 : 8
Option 4: 5 : 11
Question : Magnalium is an alloy of
Option 1: Aluminium and Mangnesium
Option 2: magnesium and Tin
Option 3: Aluminium and Zinc
Option 4: Manganese and Magnesium
Question : Zinc and copper are in the ratio 5 : 3 in 400 gm of an alloy. How much copper (in grams) should be added to make the ratio 5 : 4?
Option 1: 50
Option 2: 66
Option 3: 72
Option 4: 200
Question : Directions: Find the missing numbers from the given responses.
Option 1: 109; 111; 117
Option 2: 114; 111; 117
Option 3: 111; 114; 117
Option 4: 117; 109; 111
Question : A fuse wire is made of
Option 1: An alloy of tin and copper
Option 2: An alloy of tin and lead
Option 3: An alloy of tin and aluminium
Option 4: An alloy of Nickel and Chromium
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