A piece of cloth cost Rs 35. if the length of the piece would have been 4m longer and each meter cost Re 1 less , the cost would have remained unchanged. how long is the piece? Pick one
A) 5 mtrs  B) 10 mtrs  C) 12 mtrs  D) 15 mtrs  E) 18 mtrs
If length of piece is x and cost per mtr is C, then   x*C = 35 or C =35/x   (x+4)*(C-1) = 35 or x*C +4C-x -4 =35 or 35+4C-x -4 = 35   4C-x =4   4*(35/x)-x =4   x= 10 mtrs   ANSWER:10 mtrs
<result>B</result>
A piece of cloth cost Rs 35. if the length of the piece would have been 4m longer and each meter cost Re 1 less , the cost would have remained unchanged. how long is the piece?