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A mass of copper and brass weighs 24 pounds and is worth $30.50. If the proportion of a copper and brass be interchanged, the mass would be worth $35.50. If 2 pounds of copper and 3 pounds of brass cost $6.75, find the cost/pound of copper.
A. $1.55
B. $1.25
C. $1.50
D. $1.25
E. $1.75

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Wipro Other Question
Three glasses (equal in measurements) are filled with a mixture of spirit and water in the ratio 2:1,3:1 and 2:3 respectively. The contents of the three glass are emptied into a single empty vessel. What is the proportion of spirit and water into it?
A. 7:5
B. 123:57
C. 101:79
D. 109:71
E. 97:83 A creeper plant is climbing up and around a cylindrical tree trunk in a helical manner. The tree trunk has a height of 420 inches and a circumference of 32 inches.
If the creeper covers a vertical distance of 60 inches in one complete twist around the tree trunk, what is the total length of the creeper?
A. 476
B. 458
C. 490
D. 410
E. 450