5. The production cost of a cane chair is Rs 650. A manufacturer produces 20 such chairs. He expects to earn a profit of Rs 7 000 by selling all the chairs. In
order to do this, what should be the selling price of a chair?
Need the method​

Given: ae ≅ ce ; de ≅ be prove: abcd is a parallelogram. we have that ab || dc. by a similar argument used to prove that △aeb ≅ △ced, we can show that △ ≅ △ceb by. so, ∠cad ≅ ∠ by cpctc. therefore, ad || bc by the converse of the theorem. since both pair of opposite sides are parallel, quadrilateral abcd is a parallelogram.