In an A.P., aₙ - aₙ₋₄ = 32. Its common difference is :
A tent house owner provides furniture on rent. He stacks chairs in his shop to save space. In the diagram, the height of seat of chair from ground is represented by h₁, h₂, h₃, .... . The height of first seat is 44 cm from ground level and gap between every two seats is 10 cm.
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