There are 5 roads. One is of length( a+b), Tu of length and 2 of length beads roads are arranged to form two equilateral Triangles as shown in the figure PC and weak you are joined on the basis of above information answer the following questions
After allowing a discount of 20 percent on the marked price a trader still makes a gain of 20 percent . By what percent is the marked price above the cost price??
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