The velocity ratio of a single purchase crab winch can be increased by

A).  Increasing the length of the handle

B).  Increasing the radius of the load drum

C).  Increasing the number of teeth of the pinion

D).  All of the above

 Increasing the length of the handle

• The ratio of the sum of the salaries of A and B to the difference of their salaries is 11 : 1 and the ratio of the sum of the salaries of B and C to the difference of their salaries is also 11 : 1. If A's salary is the highest and C's is the lowest then w
• 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 allow
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