A rectangular property that is 900 meters by 1200 meters and has road frontage along all four sides is subdivided into rectangular lots. What is the greatest number of lots into which the property can be divided dso that each lot will have a total of 300 meters of road frontage?
A.14
B.12
C.10
D.9
E.8
Ans A
Technological advances in manufacturing radios reduced the manufacturing cost of parts by 50 percent and the cost of labor by 60 percent. If labor originally accounted ofr 3 times as much of the manufacturing cost as parts and it is assumed that total cost consisted only of labor and parts, what was the percent decrease in the total cost resulting from these advances?
A.30%
B.42.5%
C.55%
D.57.5%
E.70%
Ans D