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In two types of brass, the ratios of Copper to Zinc are 8:3 and 15:7 respectively. If the two types of brass be melted and mixed in the ratio 5:2 a new typeof brass is obtained. The ratio of Copper to Zinc in this new type of brass is
A
3:2
B
2:3
C
3:4
D
5:2
Correct Answer:
5:2
If 2 kg of metal, of which 1/3 is zinc and the rest is copper s, be mixed with 3 kg of metal , of which 1/4 is zinc and the rest is copper , then what will be the ratio of zinc to copper in the mixture?
A
13 : 42
B
19 : 43
C
15 : 42
D
17 : 43
In an alloy, the ratio of copper and zinc is 5 : 2. If 1.250 kg of zinc is mixed in 17 kg 500 gm of alloy, then the ratio of copper and zinc will be = ?
A
2 : 1
B
2 : 3
C
3 : 2
D
1 : 2
In an alloy, the ratio of copper and zinc is 5 : 2. If 1.250 kg of zinc is mixed in 17 kg 500 g of alloy, then the ratio of copper and zinc in the alloy will be -
A
1 : 2
B
2 : 1
C
2 : 3
D
3 : 2
4 kg of a metal contains 1/5 copper and rest in Zinc. Another 5 kg of metal contains 1/6 copper and rest in Zinc.The ratio of Copper and Zinc into the mixture of these two metals:
A
49 : 221
B
39:231
C
94:181
D
None of these
A and B are two alloys in which ratios of gold and copper are 5 : 3 and 5 : 11 respectively. If these equally amount of two alloys are melted and made alloy C. What will be the ratio of gold and copper in alloy C?
A
25 : 23
B
33 : 25
C
15 : 17
D
17 : 15
If 2 kg of metal, of which 1/3 is zine and the rest is copper , be mixed with 3 kg of metal, of which 1/4 is zinc and the rest is copper , then what will be the ratio of zinc to copper in the mixture?
A
17 : 43
B
13 : 42
C
19 : 43
D
15 : 42
In an alloy, zinc and copper are in the ratio 1 : 2. In the second alloy, the same elements are in the ratio 2 : 3. If these two alloys be mixed to form a new alloy in which two elements are in the ratio 5 : 8, the ratio of these two alloys in the new alloys is -
A
3 : 10
B
3 : 7
C
10 : 3
D
7 : 3
In two alloys A and B the ratio of Zinc and Tin is 5 : 2 and 3 : 4 respectively. 7 kg of the alloy A and 21 kg of the alloy B are mixed together to form a new alloy. What will be the ratio of Zinc and Tin tin the new alloy ?
A
2 : 1
B
1 : 2
C
2 : 3
D
1 : 1
A solid sphere has a radius 21 cm. It is melted to form a cube. 20% material is wasted in this process. The cube is melted to form hemisphere. In thisprocess 20% material is wasted. The hemisphere is melted to form two spheres of equal radius. 20% material was also wasted in this process. What is the radius (in cm) of each new sphere?
A
4.2\(23)
B
2.1\23
C
2.1\43
D
4.2\43
An alloy contains zinc, copper and tin in the ratio 2 : 3 : 1 and another contains copper, tin and lead in the ratio 5 : 4 : 3. If equal weights of both alloys are melted together to form a third alloy, then the weight of lead per kg in new alloy will be:
A
$$\frac{{1}}{{2}}$$ kg
B
$$\frac{{1}}{{8}}$$ kg
C
$$\frac{{3}}{{14}}$$ kg
D
$$\frac{{7}}{{9}}$$ kg