A tradesman gives 4 % discount on his marked price and gives 1 article free for buying every 15 articles and thus gains 35 %. By what percent is the marked price increased above the cost price?(a) 50 %(b) 40 %(c) 60 %(d) 80 %

In the figure (not to scale) AB = CD, angle DAP = angle DPA and A,B,C,D are concycli. If angle ADC = 80°, then find angle ACD.

Solve : 2^(x+2)+2^(x-1)=9

Volume of a Cylinder

What length of tarpaulin 3m wide will be required to make conical tent of height 8m and base radius 6m ? Assume that the extra length of material that will be required for stitching and wastage in cutting is approximately 20cm ( Use pi= 3.14)

Find the square of: 2a +b